llvm-6502/test/Transforms/InstCombine/memcmp-1.ll
Stephen Lin 39f4e8d9cc 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186268 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-14 01:42:54 +00:00

73 lines
2.2 KiB
LLVM

; Test that the memcmp 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"
@foo = constant [4 x i8] c"foo\00"
@hel = constant [4 x i8] c"hel\00"
@hello_u = constant [8 x i8] c"hello_u\00"
declare i32 @memcmp(i8*, i8*, i32)
; Check memcmp(mem, mem, size) -> 0.
define i32 @test_simplify1(i8* %mem, i32 %size) {
; CHECK-LABEL: @test_simplify1(
%ret = call i32 @memcmp(i8* %mem, i8* %mem, i32 %size)
ret i32 %ret
; CHECK: ret i32 0
}
; Check memcmp(mem1, mem2, 0) -> 0.
define i32 @test_simplify2(i8* %mem1, i8* %mem2) {
; CHECK-LABEL: @test_simplify2(
%ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 0)
ret i32 %ret
; CHECK: ret i32 0
}
;; Check memcmp(mem1, mem2, 1) -> *(unsigned char*)mem1 - *(unsigned char*)mem2.
define i32 @test_simplify3(i8* %mem1, i8* %mem2) {
; CHECK-LABEL: @test_simplify3(
%ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 1)
; CHECK: [[LOAD1:%[a-z]+]] = load i8* %mem1, align 1
; CHECK: [[ZEXT1:%[a-z]+]] = zext i8 [[LOAD1]] to i32
; CHECK: [[LOAD2:%[a-z]+]] = load i8* %mem2, align 1
; CHECK: [[ZEXT2:%[a-z]+]] = zext i8 [[LOAD2]] to i32
; CHECK: [[RET:%[a-z]+]] = sub i32 [[ZEXT1]], [[ZEXT2]]
ret i32 %ret
; CHECK: ret i32 [[RET]]
}
; Check memcmp(mem1, mem2, size) -> cnst, where all arguments are constants.
define i32 @test_simplify4() {
; CHECK-LABEL: @test_simplify4(
%mem1 = getelementptr [4 x i8]* @hel, i32 0, i32 0
%mem2 = getelementptr [8 x i8]* @hello_u, i32 0, i32 0
%ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 3)
ret i32 %ret
; CHECK: ret i32 0
}
define i32 @test_simplify5() {
; CHECK-LABEL: @test_simplify5(
%mem1 = getelementptr [4 x i8]* @hel, i32 0, i32 0
%mem2 = getelementptr [4 x i8]* @foo, i32 0, i32 0
%ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 3)
ret i32 %ret
; CHECK: ret i32 1
}
define i32 @test_simplify6() {
; CHECK-LABEL: @test_simplify6(
%mem1 = getelementptr [4 x i8]* @foo, i32 0, i32 0
%mem2 = getelementptr [4 x i8]* @hel, i32 0, i32 0
%ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 3)
ret i32 %ret
; CHECK: ret i32 -1
}