4a8e6ed2f7
This patch makes SLP and LV emit operations with initial vectors set to poison constant instead of undef. This is a part of efforts for using poison vector instead of undef to represent "doesn't care" vector. The goal is to make nice shufflevector optimizations valid that is currently incorrect due to the tricky interaction between undef and poison (see https://bugs.llvm.org/show_bug.cgi?id=44185 ). Reviewed By: fhahn Differential Revision: https://reviews.llvm.org/D94061
45 lines
1.9 KiB
LLVM
45 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; Regression test from https://bugs.llvm.org/show_bug.cgi?id=39168
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; Based on code from `compiler-rt/lib/builtins/multc3.c`
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; On plaforms where fp128 lowers to an interger type (soft-fp) we
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; shouldn't be calling isFAbsFree() on the legalized type.
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; RUN: opt -slp-vectorizer -slp-threshold=-10 -S %s | FileCheck %s
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target triple = "i686-unknown-linux-gnu"
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define void @vectorize_fp128(fp128 %c, fp128 %d) #0 {
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; CHECK-LABEL: @vectorize_fp128(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x fp128> poison, fp128 [[C:%.*]], i32 0
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; CHECK-NEXT: [[TMP1:%.*]] = insertelement <2 x fp128> [[TMP0]], fp128 [[D:%.*]], i32 1
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; CHECK-NEXT: [[TMP2:%.*]] = call <2 x fp128> @llvm.fabs.v2f128(<2 x fp128> [[TMP1]])
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; CHECK-NEXT: [[TMP3:%.*]] = fcmp oeq <2 x fp128> [[TMP2]], <fp128 0xL00000000000000007FFF000000000000, fp128 0xL00000000000000007FFF000000000000>
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; CHECK-NEXT: [[TMP4:%.*]] = extractelement <2 x i1> [[TMP3]], i32 0
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; CHECK-NEXT: [[TMP5:%.*]] = extractelement <2 x i1> [[TMP3]], i32 1
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; CHECK-NEXT: [[OR_COND39:%.*]] = or i1 [[TMP4]], [[TMP5]]
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; CHECK-NEXT: br i1 [[OR_COND39]], label [[IF_THEN13:%.*]], label [[IF_END24:%.*]]
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; CHECK: if.then13:
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; CHECK-NEXT: unreachable
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; CHECK: if.end24:
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; CHECK-NEXT: ret void
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;
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entry:
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%0 = tail call fp128 @llvm.fabs.f128(fp128 %c)
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%cmpinf10 = fcmp oeq fp128 %0, 0xL00000000000000007FFF000000000000
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%1 = tail call fp128 @llvm.fabs.f128(fp128 %d)
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%cmpinf12 = fcmp oeq fp128 %1, 0xL00000000000000007FFF000000000000
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%or.cond39 = or i1 %cmpinf10, %cmpinf12
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br i1 %or.cond39, label %if.then13, label %if.end24
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if.then13: ; preds = %entry
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unreachable
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if.end24: ; preds = %entry
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ret void
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}
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declare fp128 @llvm.fabs.f128(fp128)
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attributes #0 = { "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" }
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