0a1210e482
https://alive2.llvm.org/ce/z/oShzr3 This was noted as a missing fold in D134876 (with additional examples based on issue #58046). I'm assuming that fmul with a zero operand is rare enough that the use of ValueTracking will not noticeably increase compile-time. This adjusts a PowerPC codegen test that was added with D88388 because it would get folded away and no longer provide coverage for the bug fix.
42 lines
1.4 KiB
LLVM
42 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -ppc-asm-full-reg-names -verify-machineinstrs \
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; RUN: -mtriple=powerpc64le-linux-gnu < %s | FileCheck \
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; RUN: -check-prefix=CHECK-LE %s
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; RUN: llc -ppc-asm-full-reg-names -verify-machineinstrs \
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; RUN: -mtriple=powerpc64-linux-gnu < %s | FileCheck \
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; RUN: -check-prefix=CHECK-BE %s
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define i8 @_Z1f1c(i24 %x) #0 {
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; CHECK-LE-LABEL: _Z1f1c:
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; CHECK-LE: # %bb.0:
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; CHECK-LE-NEXT: clrlwi r3, r3, 8
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; CHECK-LE-NEXT: mtfprwz f0, r3
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; CHECK-LE-NEXT: addis r3, r2, .LCPI0_0@toc@ha
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; CHECK-LE-NEXT: lfd f1, .LCPI0_0@toc@l(r3)
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; CHECK-LE-NEXT: xscvuxddp f0, f0
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; CHECK-LE-NEXT: xsmuldp f0, f0, f1
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; CHECK-LE-NEXT: xscvdpsxws f0, f0
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; CHECK-LE-NEXT: mffprwz r3, f0
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; CHECK-LE-NEXT: blr
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;
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; CHECK-BE-LABEL: _Z1f1c:
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; CHECK-BE: # %bb.0:
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; CHECK-BE-NEXT: clrldi r3, r3, 40
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; CHECK-BE-NEXT: std r3, -16(r1)
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; CHECK-BE-NEXT: addis r3, r2, .LCPI0_0@toc@ha
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; CHECK-BE-NEXT: lfd f0, -16(r1)
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; CHECK-BE-NEXT: lfd f1, .LCPI0_0@toc@l(r3)
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; CHECK-BE-NEXT: fcfid f0, f0
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; CHECK-BE-NEXT: fmul f0, f0, f1
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; CHECK-BE-NEXT: fctiwz f0, f0
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; CHECK-BE-NEXT: stfd f0, -8(r1)
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; CHECK-BE-NEXT: lwz r3, -4(r1)
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; CHECK-BE-NEXT: blr
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%conv1 = uitofp i24 %x to double
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%mul = fmul double 0.1, %conv1
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%r = fptoui double %mul to i8
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ret i8 %r
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}
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attributes #0 = { "use-soft-float"="false" }
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