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llvm-project/llvm/test/Transforms/InstCombine/fabs-libcall.ll

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SimplifyLibCalls: Replace fabs libcalls with intrinsics Add missing fabs(fpext) optimzation that worked with the call, and also fixes it creating a second fpext when there were multiple uses. llvm-svn: 292172
2017-01-17 08:10:40 +08:00
; RUN: opt -S -mtriple=i686-apple-macosx -instcombine %s | FileCheck %s
declare x86_fp80 @fabsl(x86_fp80)
; CHECK-LABEL: @replace_fabs_call_f80(
; CHECK-NEXT: %fabsl = call x86_fp80 @llvm.fabs.f80(x86_fp80 %x)
; CHECK-NEXT: ret x86_fp80 %fabsl
define x86_fp80 @replace_fabs_call_f80(x86_fp80 %x) {
%fabsl = tail call x86_fp80 @fabsl(x86_fp80 %x)
ret x86_fp80 %fabsl
}
; CHECK-LABEL: @fmf_replace_fabs_call_f80(
; CHECK-NEXT: %fabsl = call nnan x86_fp80 @llvm.fabs.f80(x86_fp80 %x)
; CHECK-NEXT: ret x86_fp80 %fabsl
define x86_fp80 @fmf_replace_fabs_call_f80(x86_fp80 %x) {
%fabsl = tail call nnan x86_fp80 @fabsl(x86_fp80 %x)
ret x86_fp80 %fabsl
}