67 lines
2.1 KiB
LLVM
67 lines
2.1 KiB
LLVM
; RUN: llc < %s -mtriple=armv7-none-linux-gnueabi | FileCheck %s
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; Test that we correctly use registers and align elements when using va_arg
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%struct_t = type { double, double, double }
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@static_val = constant %struct_t { double 1.0, double 2.0, double 3.0 }
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declare void @llvm.va_start(i8*) nounwind
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declare void @llvm.va_end(i8*) nounwind
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; CHECK-LABEL: test_byval_8_bytes_alignment:
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define void @test_byval_8_bytes_alignment(i32 %i, ...) {
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entry:
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; CHECK: sub sp, sp, #12
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; CHECK: sub sp, sp, #4
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; CHECK: add r0, sp, #4
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; CHECK: stmib sp, {r1, r2, r3}
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%g = alloca i8*
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%g1 = bitcast i8** %g to i8*
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call void @llvm.va_start(i8* %g1)
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; CHECK: add [[REG:(r[0-9]+)|(lr)]], {{(r[0-9]+)|(lr)}}, #7
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; CHECK: bic [[REG]], [[REG]], #7
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%0 = va_arg i8** %g, double
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call void @llvm.va_end(i8* %g1)
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ret void
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}
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; CHECK-LABEL: main:
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; CHECK: movw [[BASE:r[0-9]+]], :lower16:static_val
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; CHECK: movt [[BASE]], :upper16:static_val
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; ldm is not formed when the coalescer failed to coalesce everything.
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; CHECK: ldrd r2, [[TMP:r[0-9]+]], {{\[}}[[BASE]]{{\]}}
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; CHECK: movw r0, #555
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define i32 @main() {
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entry:
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call void (i32, ...) @test_byval_8_bytes_alignment(i32 555, %struct_t* byval @static_val)
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ret i32 0
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}
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declare void @f(double);
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; CHECK-LABEL: test_byval_8_bytes_alignment_fixed_arg:
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; CHECK-NOT: str r1
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; CHECK: str r3, [sp, #12]
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; CHECK: str r2, [sp, #8]
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; CHECK-NOT: str r1
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define void @test_byval_8_bytes_alignment_fixed_arg(i32 %n1, %struct_t* byval %val) nounwind {
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entry:
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%a = getelementptr inbounds %struct_t, %struct_t* %val, i32 0, i32 0
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%0 = load double, double* %a
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call void (double) @f(double %0)
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ret void
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}
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; CHECK-LABEL: main_fixed_arg:
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; CHECK: movw [[BASE:r[0-9]+]], :lower16:static_val
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; CHECK: movt [[BASE]], :upper16:static_val
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; ldm is not formed when the coalescer failed to coalesce everything.
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; CHECK: ldrd r2, [[TMP:r[0-9]+]], {{\[}}[[BASE]]{{\]}}
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; CHECK: movw r0, #555
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define i32 @main_fixed_arg() {
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entry:
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call void (i32, %struct_t*) @test_byval_8_bytes_alignment_fixed_arg(i32 555, %struct_t* byval @static_val)
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ret i32 0
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}
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