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llvm-project/llvm/test/Transforms/InstCombine/abs-1.ll

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instcombine: Migrate *abs optimizations This patch migrates the *abs optimizations from the simplify-libcalls pass into the instcombine library call simplifier. llvm-svn: 168574
2012-11-26 08:24:07 +08:00
; Test that the abs library call simplifier works correctly.
;
; RUN: opt < %s -instcombine -S | FileCheck %s
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"
declare i32 @abs(i32)
declare i64 @labs(i64)
declare i64 @llabs(i64)
; Check abs(x) -> x >s -1 ? x : -x.
define i32 @test_simplify1(i32 %x) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test_simplify1(
instcombine: Migrate *abs optimizations This patch migrates the *abs optimizations from the simplify-libcalls pass into the instcombine library call simplifier. llvm-svn: 168574
2012-11-26 08:24:07 +08:00
%ret = call i32 @abs(i32 %x)
; CHECK-NEXT: [[ISPOS:%[a-z0-9]+]] = icmp sgt i32 %x, -1
; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub i32 0, %x
; CHECK-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[ISPOS]], i32 %x, i32 [[NEG]]
ret i32 %ret
; CHECK-NEXT: ret i32 [[RET]]
}
define i64 @test_simplify2(i64 %x) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test_simplify2(
instcombine: Migrate *abs optimizations This patch migrates the *abs optimizations from the simplify-libcalls pass into the instcombine library call simplifier. llvm-svn: 168574
2012-11-26 08:24:07 +08:00
%ret = call i64 @labs(i64 %x)
; CHECK-NEXT: [[ISPOS:%[a-z0-9]+]] = icmp sgt i64 %x, -1
; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub i64 0, %x
; CHECK-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[ISPOS]], i64 %x, i64 [[NEG]]
ret i64 %ret
; CHECK-NEXT: ret i64 [[RET]]
}
define i64 @test_simplify3(i64 %x) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test_simplify3(
instcombine: Migrate *abs optimizations This patch migrates the *abs optimizations from the simplify-libcalls pass into the instcombine library call simplifier. llvm-svn: 168574
2012-11-26 08:24:07 +08:00
%ret = call i64 @llabs(i64 %x)
; CHECK-NEXT: [[ISPOS:%[a-z0-9]+]] = icmp sgt i64 %x, -1
; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub i64 0, %x
; CHECK-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[ISPOS]], i64 %x, i64 [[NEG]]
ret i64 %ret
; CHECK-NEXT: ret i64 [[RET]]
}