forked from OSchip/llvm-project
150 lines
4.5 KiB
LLVM
150 lines
4.5 KiB
LLVM
; RUN: llc < %s -march=arm64 -verify-machineinstrs | FileCheck %s
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; RUN: llc < %s -march=arm64 -aarch64-unscaled-mem-op=true\
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; RUN: -verify-machineinstrs | FileCheck -check-prefix=LDUR_CHK %s
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; CHECK: ldp_int
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; CHECK: ldp
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define i32 @ldp_int(i32* %p) nounwind {
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%tmp = load i32* %p, align 4
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%add.ptr = getelementptr inbounds i32* %p, i64 1
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%tmp1 = load i32* %add.ptr, align 4
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%add = add nsw i32 %tmp1, %tmp
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ret i32 %add
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}
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; CHECK: ldp_long
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; CHECK: ldp
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define i64 @ldp_long(i64* %p) nounwind {
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%tmp = load i64* %p, align 8
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%add.ptr = getelementptr inbounds i64* %p, i64 1
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%tmp1 = load i64* %add.ptr, align 8
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%add = add nsw i64 %tmp1, %tmp
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ret i64 %add
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}
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; CHECK: ldp_float
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; CHECK: ldp
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define float @ldp_float(float* %p) nounwind {
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%tmp = load float* %p, align 4
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%add.ptr = getelementptr inbounds float* %p, i64 1
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%tmp1 = load float* %add.ptr, align 4
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%add = fadd float %tmp, %tmp1
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ret float %add
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}
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; CHECK: ldp_double
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; CHECK: ldp
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define double @ldp_double(double* %p) nounwind {
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%tmp = load double* %p, align 8
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%add.ptr = getelementptr inbounds double* %p, i64 1
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%tmp1 = load double* %add.ptr, align 8
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%add = fadd double %tmp, %tmp1
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ret double %add
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}
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; Test the load/store optimizer---combine ldurs into a ldp, if appropriate
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define i32 @ldur_int(i32* %a) nounwind {
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; LDUR_CHK: ldur_int
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; LDUR_CHK: ldp [[DST1:w[0-9]+]], [[DST2:w[0-9]+]], [x0, #-8]
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; LDUR_CHK-NEXT: add w{{[0-9]+}}, [[DST2]], [[DST1]]
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; LDUR_CHK-NEXT: ret
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%p1 = getelementptr inbounds i32* %a, i32 -1
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%tmp1 = load i32* %p1, align 2
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%p2 = getelementptr inbounds i32* %a, i32 -2
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%tmp2 = load i32* %p2, align 2
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%tmp3 = add i32 %tmp1, %tmp2
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ret i32 %tmp3
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}
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define i64 @ldur_long(i64* %a) nounwind ssp {
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; LDUR_CHK: ldur_long
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; LDUR_CHK: ldp [[DST1:x[0-9]+]], [[DST2:x[0-9]+]], [x0, #-16]
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; LDUR_CHK-NEXT: add x{{[0-9]+}}, [[DST2]], [[DST1]]
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; LDUR_CHK-NEXT: ret
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%p1 = getelementptr inbounds i64* %a, i64 -1
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%tmp1 = load i64* %p1, align 2
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%p2 = getelementptr inbounds i64* %a, i64 -2
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%tmp2 = load i64* %p2, align 2
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%tmp3 = add i64 %tmp1, %tmp2
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ret i64 %tmp3
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}
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define float @ldur_float(float* %a) {
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; LDUR_CHK: ldur_float
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; LDUR_CHK: ldp [[DST1:s[0-9]+]], [[DST2:s[0-9]+]], [x0, #-8]
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; LDUR_CHK-NEXT: add s{{[0-9]+}}, [[DST2]], [[DST1]]
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; LDUR_CHK-NEXT: ret
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%p1 = getelementptr inbounds float* %a, i64 -1
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%tmp1 = load float* %p1, align 2
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%p2 = getelementptr inbounds float* %a, i64 -2
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%tmp2 = load float* %p2, align 2
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%tmp3 = fadd float %tmp1, %tmp2
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ret float %tmp3
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}
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define double @ldur_double(double* %a) {
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; LDUR_CHK: ldur_double
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; LDUR_CHK: ldp [[DST1:d[0-9]+]], [[DST2:d[0-9]+]], [x0, #-16]
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; LDUR_CHK-NEXT: add d{{[0-9]+}}, [[DST2]], [[DST1]]
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; LDUR_CHK-NEXT: ret
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%p1 = getelementptr inbounds double* %a, i64 -1
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%tmp1 = load double* %p1, align 2
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%p2 = getelementptr inbounds double* %a, i64 -2
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%tmp2 = load double* %p2, align 2
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%tmp3 = fadd double %tmp1, %tmp2
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ret double %tmp3
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}
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; Now check some boundary conditions
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define i64 @pairUpBarelyIn(i64* %a) nounwind ssp {
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; LDUR_CHK: pairUpBarelyIn
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; LDUR_CHK-NOT: ldur
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; LDUR_CHK: ldp [[DST1:x[0-9]+]], [[DST2:x[0-9]+]], [x0, #-256]
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; LDUR_CHK-NEXT: add x{{[0-9]+}}, [[DST2]], [[DST1]]
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; LDUR_CHK-NEXT: ret
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%p1 = getelementptr inbounds i64* %a, i64 -31
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%tmp1 = load i64* %p1, align 2
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%p2 = getelementptr inbounds i64* %a, i64 -32
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%tmp2 = load i64* %p2, align 2
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%tmp3 = add i64 %tmp1, %tmp2
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ret i64 %tmp3
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}
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define i64 @pairUpBarelyOut(i64* %a) nounwind ssp {
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; LDUR_CHK: pairUpBarelyOut
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; LDUR_CHK-NOT: ldp
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; Don't be fragile about which loads or manipulations of the base register
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; are used---just check that there isn't an ldp before the add
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; LDUR_CHK: add
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; LDUR_CHK-NEXT: ret
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%p1 = getelementptr inbounds i64* %a, i64 -32
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%tmp1 = load i64* %p1, align 2
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%p2 = getelementptr inbounds i64* %a, i64 -33
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%tmp2 = load i64* %p2, align 2
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%tmp3 = add i64 %tmp1, %tmp2
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ret i64 %tmp3
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}
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define i64 @pairUpNotAligned(i64* %a) nounwind ssp {
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; LDUR_CHK: pairUpNotAligned
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; LDUR_CHK-NOT: ldp
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; LDUR_CHK: ldur
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; LDUR_CHK-NEXT: ldur
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; LDUR_CHK-NEXT: add
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; LDUR_CHK-NEXT: ret
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%p1 = getelementptr inbounds i64* %a, i64 -18
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%bp1 = bitcast i64* %p1 to i8*
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%bp1p1 = getelementptr inbounds i8* %bp1, i64 1
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%dp1 = bitcast i8* %bp1p1 to i64*
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%tmp1 = load i64* %dp1, align 1
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%p2 = getelementptr inbounds i64* %a, i64 -17
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%bp2 = bitcast i64* %p2 to i8*
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%bp2p1 = getelementptr inbounds i8* %bp2, i64 1
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%dp2 = bitcast i8* %bp2p1 to i64*
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%tmp2 = load i64* %dp2, align 1
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%tmp3 = add i64 %tmp1, %tmp2
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ret i64 %tmp3
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}
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