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Diffstat (limited to 'llvm/test/Transforms/InstCombine/memcmp-1.ll')
-rw-r--r-- | llvm/test/Transforms/InstCombine/memcmp-1.ll | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/llvm/test/Transforms/InstCombine/memcmp-1.ll b/llvm/test/Transforms/InstCombine/memcmp-1.ll deleted file mode 100644 index a82f861697c..00000000000 --- a/llvm/test/Transforms/InstCombine/memcmp-1.ll +++ /dev/null @@ -1,151 +0,0 @@ -; Test that the memcmp library call simplifier works correctly. -; -; RUN: opt < %s -instcombine -S | FileCheck --check-prefix=CHECK --check-prefix=NOBCMP %s -; RUN: opt < %s -instcombine -mtriple=x86_64-unknown-linux-gnu -S | FileCheck --check-prefix=CHECK --check-prefix=BCMP %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-n8:16:32:64" - -@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( -; CHECK-NEXT: ret i32 0 -; - %ret = call i32 @memcmp(i8* %mem, i8* %mem, i32 %size) - ret i32 %ret -} - -; Check memcmp(mem1, mem2, 0) -> 0. - -define i32 @test_simplify2(i8* %mem1, i8* %mem2) { -; CHECK-LABEL: @test_simplify2( -; CHECK-NEXT: ret i32 0 -; - %ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 0) - ret i32 %ret -} - -;; Check memcmp(mem1, mem2, 1) -> *(unsigned char*)mem1 - *(unsigned char*)mem2. - -define i32 @test_simplify3(i8* %mem1, i8* %mem2) { -; CHECK-LABEL: @test_simplify3( -; CHECK-NEXT: [[LHSC:%.*]] = load i8, i8* %mem1, align 1 -; CHECK-NEXT: [[LHSV:%.*]] = zext i8 [[LHSC]] to i32 -; CHECK-NEXT: [[RHSC:%.*]] = load i8, i8* %mem2, align 1 -; CHECK-NEXT: [[RHSV:%.*]] = zext i8 [[RHSC]] to i32 -; CHECK-NEXT: [[CHARDIFF:%.*]] = sub nsw i32 [[LHSV]], [[RHSV]] -; CHECK-NEXT: ret i32 [[CHARDIFF]] -; - %ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 1) - ret i32 %ret -} - -; Check memcmp(mem1, mem2, size) -> cnst, where all arguments are constants. - -define i32 @test_simplify4() { -; CHECK-LABEL: @test_simplify4( -; CHECK-NEXT: ret i32 0 -; - %mem1 = getelementptr [4 x i8], [4 x i8]* @hel, i32 0, i32 0 - %mem2 = getelementptr [8 x i8], [8 x i8]* @hello_u, i32 0, i32 0 - %ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 3) - ret i32 %ret -} - -define i32 @test_simplify5() { -; CHECK-LABEL: @test_simplify5( -; CHECK-NEXT: ret i32 1 -; - %mem1 = getelementptr [4 x i8], [4 x i8]* @hel, i32 0, i32 0 - %mem2 = getelementptr [4 x i8], [4 x i8]* @foo, i32 0, i32 0 - %ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 3) - ret i32 %ret -} - -define i32 @test_simplify6() { -; CHECK-LABEL: @test_simplify6( -; CHECK-NEXT: ret i32 -1 -; - %mem1 = getelementptr [4 x i8], [4 x i8]* @foo, i32 0, i32 0 - %mem2 = getelementptr [4 x i8], [4 x i8]* @hel, i32 0, i32 0 - %ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 3) - ret i32 %ret -} - -; Check memcmp(mem1, mem2, 8)==0 -> *(int64_t*)mem1 == *(int64_t*)mem2 - -define i1 @test_simplify7(i64 %x, i64 %y) { -; CHECK-LABEL: @test_simplify7( -; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 %x, %y -; CHECK-NEXT: ret i1 [[CMP]] -; - %x.addr = alloca i64, align 8 - %y.addr = alloca i64, align 8 - store i64 %x, i64* %x.addr, align 8 - store i64 %y, i64* %y.addr, align 8 - %xptr = bitcast i64* %x.addr to i8* - %yptr = bitcast i64* %y.addr to i8* - %call = call i32 @memcmp(i8* %xptr, i8* %yptr, i32 8) - %cmp = icmp eq i32 %call, 0 - ret i1 %cmp -} - -; Check memcmp(mem1, mem2, 4)==0 -> *(int32_t*)mem1 == *(int32_t*)mem2 - -define i1 @test_simplify8(i32 %x, i32 %y) { -; CHECK-LABEL: @test_simplify8( -; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %x, %y -; CHECK-NEXT: ret i1 [[CMP]] -; - %x.addr = alloca i32, align 4 - %y.addr = alloca i32, align 4 - store i32 %x, i32* %x.addr, align 4 - store i32 %y, i32* %y.addr, align 4 - %xptr = bitcast i32* %x.addr to i8* - %yptr = bitcast i32* %y.addr to i8* - %call = call i32 @memcmp(i8* %xptr, i8* %yptr, i32 4) - %cmp = icmp eq i32 %call, 0 - ret i1 %cmp -} - -; Check memcmp(mem1, mem2, 2)==0 -> *(int16_t*)mem1 == *(int16_t*)mem2 - -define i1 @test_simplify9(i16 %x, i16 %y) { -; CHECK-LABEL: @test_simplify9( -; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 %x, %y -; CHECK-NEXT: ret i1 [[CMP]] -; - %x.addr = alloca i16, align 2 - %y.addr = alloca i16, align 2 - store i16 %x, i16* %x.addr, align 2 - store i16 %y, i16* %y.addr, align 2 - %xptr = bitcast i16* %x.addr to i8* - %yptr = bitcast i16* %y.addr to i8* - %call = call i32 @memcmp(i8* %xptr, i8* %yptr, i32 2) - %cmp = icmp eq i32 %call, 0 - ret i1 %cmp -} - -; Check memcmp(mem1, mem2, size)==0 -> bcmp(mem1, mem2, size)==0 - -define i1 @test_simplify10(i8* %mem1, i8* %mem2, i32 %size) { -; NOBCMP-LABEL: @test_simplify10( -; NOBCMP-NEXT: [[CALL:%.*]] = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 %size) -; NOBCMP-NEXT: [[CMP:%.*]] = icmp eq i32 [[CALL]], 0 -; NOBCMP-NEXT: ret i1 [[CMP]] -; -; BCMP-LABEL: @test_simplify10( -; BCMP-NEXT: [[CALL:%.*]] = call i32 @bcmp(i8* %mem1, i8* %mem2, i32 %size) -; BCMP-NEXT: [[CMP:%.*]] = icmp eq i32 [[CALL]], 0 -; BCMP-NEXT: ret i1 [[CMP]] -; - %call = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 %size) - %cmp = icmp eq i32 %call, 0 - ret i1 %cmp -} |