derek.holloway
7502bf64a4
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34 lines
1.4 KiB
LLVM
34 lines
1.4 KiB
LLVM
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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; ModuleID = '3555a.c'
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; sqrt(fabs) cannot be negative zero, so we should eliminate the fadd.
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i386-apple-darwin9.8"
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; CHECK-LABEL: @mysqrt(
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; CHECK-NOT: fadd
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; CHECK: ret
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define double @mysqrt(double %x) nounwind {
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entry:
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%x_addr = alloca double ; <ptr> [#uses=2]
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%retval = alloca double, align 8 ; <ptr> [#uses=2]
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%0 = alloca double, align 8 ; <ptr> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store double %x, ptr %x_addr
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%1 = load double, ptr %x_addr, align 8 ; <double> [#uses=1]
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%2 = call double @fabs(double %1) nounwind readnone ; <double> [#uses=1]
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%3 = call double @sqrt(double %2) nounwind readonly ; <double> [#uses=1]
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%4 = fadd double %3, 0.000000e+00 ; <double> [#uses=1]
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store double %4, ptr %0, align 8
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%5 = load double, ptr %0, align 8 ; <double> [#uses=1]
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store double %5, ptr %retval, align 8
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br label %return
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return: ; preds = %entry
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%retval1 = load double, ptr %retval ; <double> [#uses=1]
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ret double %retval1
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}
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declare double @fabs(double)
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declare double @sqrt(double) nounwind readonly
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