356 lines
14 KiB
LLVM
356 lines
14 KiB
LLVM
; Test the handling of base + index + 12-bit displacement addresses for
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; large frames, in cases where no 20-bit form exists. The tests here
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; assume z10 register pressure, without the high words being available.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | \
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; RUN: FileCheck -check-prefix=CHECK-NOFP %s
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 -disable-fp-elim | \
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; RUN: FileCheck -check-prefix=CHECK-FP %s
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declare void @foo(float *%ptr1, float *%ptr2)
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; This file tests what happens when a displacement is converted from
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; being relative to the start of a frame object to being relative to
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; the frame itself. In some cases the test is only possible if two
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; objects are allocated.
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;
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; Rather than rely on a particular order for those objects, the tests
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; instead allocate two objects of the same size and apply the test to
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; both of them. For consistency, all tests follow this model, even if
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; one object would actually be enough.
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; First check the highest in-range offset after conversion, which is 4092
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; for word-addressing instructions like LDEB.
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;
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; The last in-range doubleword offset is 4088. Since the frame has two
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; emergency spill slots at 160(%r15), the amount that we need to allocate
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; in order to put another object at offset 4088 is (4088 - 176) / 4 = 978
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; words.
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define void @f1(double *%dst) {
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; CHECK-NOFP-LABEL: f1:
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; CHECK-NOFP: ldeb {{%f[0-7]}}, 4092(%r15)
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; CHECK-NOFP: br %r14
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;
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; CHECK-FP-LABEL: f1:
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; CHECK-FP: ldeb {{%f[0-7]}}, 4092(%r11)
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; CHECK-FP: br %r14
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%region1 = alloca [978 x float], align 8
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%region2 = alloca [978 x float], align 8
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%start1 = getelementptr inbounds [978 x float], [978 x float]* %region1, i64 0, i64 0
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%start2 = getelementptr inbounds [978 x float], [978 x float]* %region2, i64 0, i64 0
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call void @foo(float *%start1, float *%start2)
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%ptr1 = getelementptr inbounds [978 x float], [978 x float]* %region1, i64 0, i64 1
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%ptr2 = getelementptr inbounds [978 x float], [978 x float]* %region2, i64 0, i64 1
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%float1 = load float, float *%ptr1
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%float2 = load float, float *%ptr2
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%double1 = fpext float %float1 to double
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%double2 = fpext float %float2 to double
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store volatile double %double1, double *%dst
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store volatile double %double2, double *%dst
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ret void
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}
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; Test the first out-of-range offset.
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define void @f2(double *%dst) {
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; CHECK-NOFP-LABEL: f2:
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; CHECK-NOFP: lghi %r1, 4096
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; CHECK-NOFP: ldeb {{%f[0-7]}}, 0(%r1,%r15)
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; CHECK-NOFP: br %r14
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;
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; CHECK-FP-LABEL: f2:
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; CHECK-FP: lghi %r1, 4096
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; CHECK-FP: ldeb {{%f[0-7]}}, 0(%r1,%r11)
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; CHECK-FP: br %r14
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%region1 = alloca [978 x float], align 8
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%region2 = alloca [978 x float], align 8
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%start1 = getelementptr inbounds [978 x float], [978 x float]* %region1, i64 0, i64 0
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%start2 = getelementptr inbounds [978 x float], [978 x float]* %region2, i64 0, i64 0
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call void @foo(float *%start1, float *%start2)
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%ptr1 = getelementptr inbounds [978 x float], [978 x float]* %region1, i64 0, i64 2
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%ptr2 = getelementptr inbounds [978 x float], [978 x float]* %region2, i64 0, i64 2
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%float1 = load float, float *%ptr1
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%float2 = load float, float *%ptr2
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%double1 = fpext float %float1 to double
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%double2 = fpext float %float2 to double
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store volatile double %double1, double *%dst
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store volatile double %double2, double *%dst
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ret void
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}
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; Test the next offset after that.
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define void @f3(double *%dst) {
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; CHECK-NOFP-LABEL: f3:
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; CHECK-NOFP: lghi %r1, 4096
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; CHECK-NOFP: ldeb {{%f[0-7]}}, 4(%r1,%r15)
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; CHECK-NOFP: br %r14
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;
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; CHECK-FP-LABEL: f3:
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; CHECK-FP: lghi %r1, 4096
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; CHECK-FP: ldeb {{%f[0-7]}}, 4(%r1,%r11)
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; CHECK-FP: br %r14
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%region1 = alloca [978 x float], align 8
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%region2 = alloca [978 x float], align 8
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%start1 = getelementptr inbounds [978 x float], [978 x float]* %region1, i64 0, i64 0
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%start2 = getelementptr inbounds [978 x float], [978 x float]* %region2, i64 0, i64 0
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call void @foo(float *%start1, float *%start2)
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%ptr1 = getelementptr inbounds [978 x float], [978 x float]* %region1, i64 0, i64 3
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%ptr2 = getelementptr inbounds [978 x float], [978 x float]* %region2, i64 0, i64 3
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%float1 = load float, float *%ptr1
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%float2 = load float, float *%ptr2
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%double1 = fpext float %float1 to double
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%double2 = fpext float %float2 to double
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store volatile double %double1, double *%dst
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store volatile double %double2, double *%dst
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ret void
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}
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; Add 4096 bytes (1024 words) to the size of each object and repeat.
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define void @f4(double *%dst) {
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; CHECK-NOFP-LABEL: f4:
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; CHECK-NOFP: lghi %r1, 4096
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; CHECK-NOFP: ldeb {{%f[0-7]}}, 4092(%r1,%r15)
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; CHECK-NOFP: br %r14
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;
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; CHECK-FP-LABEL: f4:
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; CHECK-FP: lghi %r1, 4096
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; CHECK-FP: ldeb {{%f[0-7]}}, 4092(%r1,%r11)
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; CHECK-FP: br %r14
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%region1 = alloca [2002 x float], align 8
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%region2 = alloca [2002 x float], align 8
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%start1 = getelementptr inbounds [2002 x float], [2002 x float]* %region1, i64 0, i64 0
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%start2 = getelementptr inbounds [2002 x float], [2002 x float]* %region2, i64 0, i64 0
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call void @foo(float *%start1, float *%start2)
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%ptr1 = getelementptr inbounds [2002 x float], [2002 x float]* %region1, i64 0, i64 1
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%ptr2 = getelementptr inbounds [2002 x float], [2002 x float]* %region2, i64 0, i64 1
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%float1 = load float, float *%ptr1
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%float2 = load float, float *%ptr2
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%double1 = fpext float %float1 to double
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%double2 = fpext float %float2 to double
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store volatile double %double1, double *%dst
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store volatile double %double2, double *%dst
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ret void
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}
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; ...as above.
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define void @f5(double *%dst) {
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; CHECK-NOFP-LABEL: f5:
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; CHECK-NOFP: lghi %r1, 8192
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; CHECK-NOFP: ldeb {{%f[0-7]}}, 0(%r1,%r15)
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; CHECK-NOFP: br %r14
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;
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; CHECK-FP-LABEL: f5:
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; CHECK-FP: lghi %r1, 8192
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; CHECK-FP: ldeb {{%f[0-7]}}, 0(%r1,%r11)
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; CHECK-FP: br %r14
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%region1 = alloca [2002 x float], align 8
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%region2 = alloca [2002 x float], align 8
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%start1 = getelementptr inbounds [2002 x float], [2002 x float]* %region1, i64 0, i64 0
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%start2 = getelementptr inbounds [2002 x float], [2002 x float]* %region2, i64 0, i64 0
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call void @foo(float *%start1, float *%start2)
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%ptr1 = getelementptr inbounds [2002 x float], [2002 x float]* %region1, i64 0, i64 2
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%ptr2 = getelementptr inbounds [2002 x float], [2002 x float]* %region2, i64 0, i64 2
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%float1 = load float, float *%ptr1
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%float2 = load float, float *%ptr2
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%double1 = fpext float %float1 to double
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%double2 = fpext float %float2 to double
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store volatile double %double1, double *%dst
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store volatile double %double2, double *%dst
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ret void
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}
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; ...as above.
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define void @f6(double *%dst) {
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; CHECK-NOFP-LABEL: f6:
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; CHECK-NOFP: lghi %r1, 8192
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; CHECK-NOFP: ldeb {{%f[0-7]}}, 4(%r1,%r15)
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; CHECK-NOFP: br %r14
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;
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; CHECK-FP-LABEL: f6:
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; CHECK-FP: lghi %r1, 8192
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; CHECK-FP: ldeb {{%f[0-7]}}, 4(%r1,%r11)
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; CHECK-FP: br %r14
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%region1 = alloca [2002 x float], align 8
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%region2 = alloca [2002 x float], align 8
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%start1 = getelementptr inbounds [2002 x float], [2002 x float]* %region1, i64 0, i64 0
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%start2 = getelementptr inbounds [2002 x float], [2002 x float]* %region2, i64 0, i64 0
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call void @foo(float *%start1, float *%start2)
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%ptr1 = getelementptr inbounds [2002 x float], [2002 x float]* %region1, i64 0, i64 3
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%ptr2 = getelementptr inbounds [2002 x float], [2002 x float]* %region2, i64 0, i64 3
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%float1 = load float, float *%ptr1
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%float2 = load float, float *%ptr2
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%double1 = fpext float %float1 to double
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%double2 = fpext float %float2 to double
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store volatile double %double1, double *%dst
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store volatile double %double2, double *%dst
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ret void
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}
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; Now try an offset of 4092 from the start of the object, with the object
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; being at offset 8192. This time we need objects of (8192 - 168) / 4 = 2004
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; words.
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define void @f7(double *%dst) {
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; CHECK-NOFP-LABEL: f7:
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; CHECK-NOFP: lghi %r1, 8192
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; CHECK-NOFP: ldeb {{%f[0-7]}}, 4092(%r1,%r15)
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; CHECK-NOFP: br %r14
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;
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; CHECK-FP-LABEL: f7:
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; CHECK-FP: lghi %r1, 8192
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; CHECK-FP: ldeb {{%f[0-7]}}, 4092(%r1,%r11)
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; CHECK-FP: br %r14
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%region1 = alloca [2004 x float], align 8
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%region2 = alloca [2004 x float], align 8
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%start1 = getelementptr inbounds [2004 x float], [2004 x float]* %region1, i64 0, i64 0
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%start2 = getelementptr inbounds [2004 x float], [2004 x float]* %region2, i64 0, i64 0
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call void @foo(float *%start1, float *%start2)
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%ptr1 = getelementptr inbounds [2004 x float], [2004 x float]* %region1, i64 0, i64 1023
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%ptr2 = getelementptr inbounds [2004 x float], [2004 x float]* %region2, i64 0, i64 1023
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%float1 = load float, float *%ptr1
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%float2 = load float, float *%ptr2
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%double1 = fpext float %float1 to double
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%double2 = fpext float %float2 to double
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store volatile double %double1, double *%dst
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store volatile double %double2, double *%dst
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ret void
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}
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; Keep the object-relative offset the same but bump the size of the
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; objects by one doubleword.
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define void @f8(double *%dst) {
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; CHECK-NOFP-LABEL: f8:
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; CHECK-NOFP: lghi %r1, 12288
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; CHECK-NOFP: ldeb {{%f[0-7]}}, 4(%r1,%r15)
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; CHECK-NOFP: br %r14
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;
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; CHECK-FP-LABEL: f8:
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; CHECK-FP: lghi %r1, 12288
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; CHECK-FP: ldeb {{%f[0-7]}}, 4(%r1,%r11)
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; CHECK-FP: br %r14
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%region1 = alloca [2006 x float], align 8
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%region2 = alloca [2006 x float], align 8
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%start1 = getelementptr inbounds [2006 x float], [2006 x float]* %region1, i64 0, i64 0
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%start2 = getelementptr inbounds [2006 x float], [2006 x float]* %region2, i64 0, i64 0
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call void @foo(float *%start1, float *%start2)
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%ptr1 = getelementptr inbounds [2006 x float], [2006 x float]* %region1, i64 0, i64 1023
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%ptr2 = getelementptr inbounds [2006 x float], [2006 x float]* %region2, i64 0, i64 1023
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%float1 = load float, float *%ptr1
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%float2 = load float, float *%ptr2
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%double1 = fpext float %float1 to double
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%double2 = fpext float %float2 to double
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store volatile double %double1, double *%dst
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store volatile double %double2, double *%dst
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ret void
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}
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; Check a case where the original displacement is out of range. The backend
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; should force an LAY from the outset. We don't yet do any kind of anchor
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; optimization, so there should be no offset on the LDEB itself.
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define void @f9(double *%dst) {
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; CHECK-NOFP-LABEL: f9:
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; CHECK-NOFP: lay %r1, 12296(%r15)
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; CHECK-NOFP: ldeb {{%f[0-7]}}, 0(%r1)
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; CHECK-NOFP: br %r14
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;
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; CHECK-FP-LABEL: f9:
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; CHECK-FP: lay %r1, 12296(%r11)
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; CHECK-FP: ldeb {{%f[0-7]}}, 0(%r1)
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; CHECK-FP: br %r14
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%region1 = alloca [2006 x float], align 8
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%region2 = alloca [2006 x float], align 8
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%start1 = getelementptr inbounds [2006 x float], [2006 x float]* %region1, i64 0, i64 0
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%start2 = getelementptr inbounds [2006 x float], [2006 x float]* %region2, i64 0, i64 0
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call void @foo(float *%start1, float *%start2)
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%ptr1 = getelementptr inbounds [2006 x float], [2006 x float]* %region1, i64 0, i64 1024
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%ptr2 = getelementptr inbounds [2006 x float], [2006 x float]* %region2, i64 0, i64 1024
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%float1 = load float, float *%ptr1
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%float2 = load float, float *%ptr2
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%double1 = fpext float %float1 to double
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%double2 = fpext float %float2 to double
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store volatile double %double1, double *%dst
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store volatile double %double2, double *%dst
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ret void
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}
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; Repeat f2 in a case that needs the emergency spill slots, because all
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; call-clobbered and allocated call-saved registers are live. Note that
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; %vptr and %dst are copied to call-saved registers, freeing up %r2 and
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; %r3 during the main test.
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define void @f10(i32 *%vptr, double *%dst) {
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; CHECK-NOFP-LABEL: f10:
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; CHECK-NOFP: stg [[REGISTER:%r[1-9][0-4]?]], [[OFFSET:160|168]](%r15)
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; CHECK-NOFP: lghi [[REGISTER]], 4096
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; CHECK-NOFP: ldeb {{%f[0-7]}}, 0([[REGISTER]],%r15)
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; CHECK-NOFP: lg [[REGISTER]], [[OFFSET]](%r15)
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; CHECK-NOFP: br %r14
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;
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; CHECK-FP-LABEL: f10:
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; CHECK-FP: stg [[REGISTER:%r[1-9][0-4]?]], [[OFFSET:160|168]](%r11)
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; CHECK-FP: lghi [[REGISTER]], 4096
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; CHECK-FP: ldeb {{%f[0-7]}}, 0([[REGISTER]],%r11)
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; CHECK-FP: lg [[REGISTER]], [[OFFSET]](%r11)
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; CHECK-FP: br %r14
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%region1 = alloca [978 x float], align 8
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%region2 = alloca [978 x float], align 8
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%start1 = getelementptr inbounds [978 x float], [978 x float]* %region1, i64 0, i64 0
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%start2 = getelementptr inbounds [978 x float], [978 x float]* %region2, i64 0, i64 0
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call void @foo(float *%start1, float *%start2)
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%ptr1 = getelementptr inbounds [978 x float], [978 x float]* %region1, i64 0, i64 2
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%ptr2 = getelementptr inbounds [978 x float], [978 x float]* %region2, i64 0, i64 2
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%i0 = load volatile i32, i32 *%vptr
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%i1 = load volatile i32, i32 *%vptr
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%i2 = load volatile i32, i32 *%vptr
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%i3 = load volatile i32, i32 *%vptr
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%i4 = load volatile i32, i32 *%vptr
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%i5 = load volatile i32, i32 *%vptr
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%i14 = load volatile i32, i32 *%vptr
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%float1 = load float, float *%ptr1
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%float2 = load float, float *%ptr2
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%double1 = fpext float %float1 to double
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%double2 = fpext float %float2 to double
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store volatile double %double1, double *%dst
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store volatile double %double2, double *%dst
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store volatile i32 %i0, i32 *%vptr
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store volatile i32 %i1, i32 *%vptr
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store volatile i32 %i2, i32 *%vptr
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store volatile i32 %i3, i32 *%vptr
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store volatile i32 %i4, i32 *%vptr
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store volatile i32 %i5, i32 *%vptr
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store volatile i32 %i14, i32 *%vptr
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ret void
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}
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; Repeat f2 in a case where the index register is already occupied.
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define void @f11(double *%dst, i64 %index) {
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; CHECK-NOFP-LABEL: f11:
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; CHECK-NOFP: lgr [[REGISTER:%r[1-9][0-5]?]], %r3
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; CHECK-NOFP: lay %r1, 4096(%r15)
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; CHECK-NOFP: ldeb {{%f[0-7]}}, 0([[REGISTER]],%r1)
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; CHECK-NOFP: br %r14
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;
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; CHECK-FP-LABEL: f11:
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; CHECK-FP: lgr [[REGISTER:%r[1-9][0-5]?]], %r3
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; CHECK-FP: lay %r1, 4096(%r11)
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; CHECK-FP: ldeb {{%f[0-7]}}, 0([[REGISTER]],%r1)
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; CHECK-FP: br %r14
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%region1 = alloca [978 x float], align 8
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%region2 = alloca [978 x float], align 8
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%start1 = getelementptr inbounds [978 x float], [978 x float]* %region1, i64 0, i64 0
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%start2 = getelementptr inbounds [978 x float], [978 x float]* %region2, i64 0, i64 0
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call void @foo(float *%start1, float *%start2)
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%elem1 = getelementptr inbounds [978 x float], [978 x float]* %region1, i64 0, i64 2
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%elem2 = getelementptr inbounds [978 x float], [978 x float]* %region2, i64 0, i64 2
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%base1 = ptrtoint float *%elem1 to i64
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%base2 = ptrtoint float *%elem2 to i64
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%addr1 = add i64 %base1, %index
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%addr2 = add i64 %base2, %index
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%ptr1 = inttoptr i64 %addr1 to float *
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%ptr2 = inttoptr i64 %addr2 to float *
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%float1 = load float, float *%ptr1
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%float2 = load float, float *%ptr2
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%double1 = fpext float %float1 to double
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%double2 = fpext float %float2 to double
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store volatile double %double1, double *%dst
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store volatile double %double2, double *%dst
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ret void
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}
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