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5ae9d3637d
When a D-Form instruction is fed by an add-immediate, we attempt to merge the two immediates to form a single displacement so we can remove the add-immediate. However, we don't check whether the new displacement fits into a 16-bit signed immediate field early enough. Namely, we do a sign-extend from 16 bits first which will discard high bits and then we check whether the result is a 16-bit signed immediate. It of course will always be. Move the check prior to the sign extend to ensure we are checking the correct value. Fixes https://bugs.llvm.org/show_bug.cgi?id=49640
68 lines
2.4 KiB
LLVM
68 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mcpu=pwr9 -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr \
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; RUN: -mtriple=powerpc64le-unknown-unknown < %s | FileCheck %s \
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; RUN: -check-prefix=CHECK-P9
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@_ZL3num = external dso_local unnamed_addr global float, align 4
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define dso_local void @main() local_unnamed_addr personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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; CHECK-P9-LABEL: main:
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; CHECK-P9: # %bb.0: # %bb
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; CHECK-P9-NEXT: mflr r0
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; CHECK-P9-NEXT: std r0, 16(r1)
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; CHECK-P9-NEXT: stdu r1, -32(r1)
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; CHECK-P9-NEXT: .cfi_def_cfa_offset 32
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; CHECK-P9-NEXT: .cfi_offset lr, 16
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; CHECK-P9-NEXT: bl malloc
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; CHECK-P9-NEXT: nop
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; CHECK-P9-NEXT: addis r4, r2, _ZL3num@toc@ha
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; CHECK-P9-NEXT: addi r3, r3, -25400
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; CHECK-P9-NEXT: lfs f0, _ZL3num@toc@l(r4)
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; CHECK-P9-NEXT: addis r4, r2, .LCPI0_0@toc@ha
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; CHECK-P9-NEXT: lfs f1, .LCPI0_0@toc@l(r4)
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; CHECK-P9-NEXT: li r4, 0
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; CHECK-P9-NEXT: xsmulsp f0, f0, f1
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; CHECK-P9-NEXT: cmpldi r4, 0
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; CHECK-P9-NEXT: beq- cr0, .LBB0_2
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; CHECK-P9-NEXT: .p2align 5
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; CHECK-P9-NEXT: .LBB0_1: # %bb5
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; CHECK-P9-NEXT: #
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; CHECK-P9-NEXT: addi r3, r3, 25400
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; CHECK-P9-NEXT: addi r4, r4, 25400
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; CHECK-P9-NEXT: stfs f0, 15240(r3)
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; CHECK-P9-NEXT: cmpldi r4, 0
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; CHECK-P9-NEXT: bne+ cr0, .LBB0_1
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; CHECK-P9-NEXT: .LBB0_2: # %bb16
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bb:
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%i = tail call noalias dereferenceable_or_null(6451600) i8* @malloc()
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%i1 = bitcast i8* %i to float*
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br label %bb2
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bb2: ; preds = %bb5, %bb
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%i3 = phi i64 [ 0, %bb ], [ %i15, %bb5 ]
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%i4 = icmp eq i64 %i3, 0
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br i1 %i4, label %bb16, label %bb5
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bb5: ; preds = %bb2
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%i6 = mul nuw nsw i64 %i3, 1270
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%i7 = add nuw nsw i64 %i6, 0
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%i8 = getelementptr inbounds float, float* %i1, i64 %i7
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store float undef, float* %i8, align 4
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%i9 = add nuw nsw i64 %i3, 3
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%i10 = load float, float* @_ZL3num, align 4
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%i11 = fmul float %i10, 0x3E00000000000000
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%i12 = mul nuw nsw i64 %i9, 1270
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%i13 = add nuw nsw i64 %i12, 0
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%i14 = getelementptr inbounds float, float* %i1, i64 %i13
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store float %i11, float* %i14, align 4
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%i15 = add nuw nsw i64 %i3, 5
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br label %bb2
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bb16: ; preds = %bb2
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unreachable
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}
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declare i32 @__gxx_personality_v0(...)
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declare i8* @malloc() local_unnamed_addr
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