151 lines
5.9 KiB
LLVM
151 lines
5.9 KiB
LLVM
; RUN: opt -instcombine -early-cse -S < %s | FileCheck %s
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; CHECK-LABEL: define i8* @simplifyNullLaunder()
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define i8* @simplifyNullLaunder() {
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; CHECK-NEXT: ret i8* null
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%b2 = call i8* @llvm.launder.invariant.group.p0i8(i8* null)
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ret i8* %b2
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}
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; CHECK-LABEL: define i8* @dontSimplifyNullLaunderNoNullOpt()
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define i8* @dontSimplifyNullLaunderNoNullOpt() #0 {
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; CHECK-NEXT: call i8* @llvm.launder.invariant.group.p0i8(i8* null)
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%b2 = call i8* @llvm.launder.invariant.group.p0i8(i8* null)
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ret i8* %b2
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}
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; CHECK-LABEL: define i8 addrspace(42)* @dontsimplifyNullLaunderForDifferentAddrspace()
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define i8 addrspace(42)* @dontsimplifyNullLaunderForDifferentAddrspace() {
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; CHECK: %b2 = call i8 addrspace(42)* @llvm.launder.invariant.group.p42i8(i8 addrspace(42)* null)
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; CHECK: ret i8 addrspace(42)* %b2
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%b2 = call i8 addrspace(42)* @llvm.launder.invariant.group.p42i8(i8 addrspace(42)* null)
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ret i8 addrspace(42)* %b2
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}
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; CHECK-LABEL: define i8* @simplifyUndefLaunder()
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define i8* @simplifyUndefLaunder() {
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; CHECK-NEXT: ret i8* undef
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%b2 = call i8* @llvm.launder.invariant.group.p0i8(i8* undef)
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ret i8* %b2
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}
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; CHECK-LABEL: define i8 addrspace(42)* @simplifyUndefLaunder2()
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define i8 addrspace(42)* @simplifyUndefLaunder2() {
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; CHECK-NEXT: ret i8 addrspace(42)* undef
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%b2 = call i8 addrspace(42)* @llvm.launder.invariant.group.p42i8(i8 addrspace(42)* undef)
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ret i8 addrspace(42)* %b2
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}
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; CHECK-LABEL: define i8* @simplifyNullStrip()
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define i8* @simplifyNullStrip() {
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; CHECK-NEXT: ret i8* null
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%b2 = call i8* @llvm.strip.invariant.group.p0i8(i8* null)
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ret i8* %b2
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}
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; CHECK-LABEL: define i8* @dontSimplifyNullStripNonNullOpt()
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define i8* @dontSimplifyNullStripNonNullOpt() #0 {
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; CHECK-NEXT: call i8* @llvm.strip.invariant.group.p0i8(i8* null)
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%b2 = call i8* @llvm.strip.invariant.group.p0i8(i8* null)
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ret i8* %b2
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}
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; CHECK-LABEL: define i8 addrspace(42)* @dontsimplifyNullStripForDifferentAddrspace()
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define i8 addrspace(42)* @dontsimplifyNullStripForDifferentAddrspace() {
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; CHECK: %b2 = call i8 addrspace(42)* @llvm.strip.invariant.group.p42i8(i8 addrspace(42)* null)
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; CHECK: ret i8 addrspace(42)* %b2
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%b2 = call i8 addrspace(42)* @llvm.strip.invariant.group.p42i8(i8 addrspace(42)* null)
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ret i8 addrspace(42)* %b2
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}
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; CHECK-LABEL: define i8* @simplifyUndefStrip()
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define i8* @simplifyUndefStrip() {
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; CHECK-NEXT: ret i8* undef
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%b2 = call i8* @llvm.strip.invariant.group.p0i8(i8* undef)
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ret i8* %b2
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}
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; CHECK-LABEL: define i8 addrspace(42)* @simplifyUndefStrip2()
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define i8 addrspace(42)* @simplifyUndefStrip2() {
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; CHECK-NEXT: ret i8 addrspace(42)* undef
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%b2 = call i8 addrspace(42)* @llvm.strip.invariant.group.p42i8(i8 addrspace(42)* undef)
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ret i8 addrspace(42)* %b2
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}
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; CHECK-LABEL: define i8* @simplifyLaunderOfLaunder(
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define i8* @simplifyLaunderOfLaunder(i8* %a) {
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; CHECK: call i8* @llvm.launder.invariant.group.p0i8(i8* %a)
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; CHECK-NOT: llvm.launder.invariant.group
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%a2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %a)
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%a3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %a2)
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ret i8* %a3
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}
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; CHECK-LABEL: define i8* @simplifyStripOfLaunder(
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define i8* @simplifyStripOfLaunder(i8* %a) {
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; CHECK-NOT: llvm.launder.invariant.group
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; CHECK: call i8* @llvm.strip.invariant.group.p0i8(i8* %a)
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%a2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %a)
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%a3 = call i8* @llvm.strip.invariant.group.p0i8(i8* %a2)
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ret i8* %a3
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}
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; CHECK-LABEL: define i1 @simplifyForCompare(
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define i1 @simplifyForCompare(i8* %a) {
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%a2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %a)
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%a3 = call i8* @llvm.strip.invariant.group.p0i8(i8* %a2)
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%b2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %a)
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%c = icmp eq i8* %a3, %b2
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; CHECK: ret i1 true
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ret i1 %c
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}
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; CHECK-LABEL: define i16* @skipWithDifferentTypes(
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define i16* @skipWithDifferentTypes(i8* %a) {
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%a2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %a)
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%c1 = bitcast i8* %a2 to i16*
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; CHECK: %[[b:.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8* %a)
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%a3 = call i16* @llvm.strip.invariant.group.p0i16(i16* %c1)
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; CHECK-NEXT: %[[r:.*]] = bitcast i8* %[[b]] to i16*
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; CHECK-NEXT: ret i16* %[[r]]
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ret i16* %a3
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}
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; CHECK-LABEL: define i16 addrspace(42)* @skipWithDifferentTypesAddrspace(
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define i16 addrspace(42)* @skipWithDifferentTypesAddrspace(i8 addrspace(42)* %a) {
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%a2 = call i8 addrspace(42)* @llvm.launder.invariant.group.p42i8(i8 addrspace(42)* %a)
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%c1 = bitcast i8 addrspace(42)* %a2 to i16 addrspace(42)*
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; CHECK: %[[b:.*]] = call i8 addrspace(42)* @llvm.strip.invariant.group.p42i8(i8 addrspace(42)* %a)
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%a3 = call i16 addrspace(42)* @llvm.strip.invariant.group.p42i16(i16 addrspace(42)* %c1)
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; CHECK-NEXT: %[[r:.*]] = bitcast i8 addrspace(42)* %[[b]] to i16 addrspace(42)*
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; CHECK-NEXT: ret i16 addrspace(42)* %[[r]]
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ret i16 addrspace(42)* %a3
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}
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; CHECK-LABEL: define i16 addrspace(42)* @skipWithDifferentTypesDifferentAddrspace(
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define i16 addrspace(42)* @skipWithDifferentTypesDifferentAddrspace(i8* %a) {
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%cast = addrspacecast i8* %a to i8 addrspace(42)*
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%a2 = call i8 addrspace(42)* @llvm.launder.invariant.group.p42i8(i8 addrspace(42)* %cast)
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%c1 = bitcast i8 addrspace(42)* %a2 to i16 addrspace(42)*
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; CHECK: %[[b:.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8* %a)
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%a3 = call i16 addrspace(42)* @llvm.strip.invariant.group.p42i16(i16 addrspace(42)* %c1)
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; CHECK-NEXT: %[[r:.*]] = bitcast i8* %[[b]] to i16*
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; CHECK-NEXT: %[[r2:.*]] = addrspacecast i16* %[[r]] to i16 addrspace(42)*
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; CHECK-NEXT: ret i16 addrspace(42)* %[[r2]]
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ret i16 addrspace(42)* %a3
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}
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declare i8* @llvm.launder.invariant.group.p0i8(i8*)
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declare i8 addrspace(42)* @llvm.launder.invariant.group.p42i8(i8 addrspace(42)*)
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declare i8* @llvm.strip.invariant.group.p0i8(i8*)
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declare i8 addrspace(42)* @llvm.strip.invariant.group.p42i8(i8 addrspace(42)*)
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declare i16* @llvm.strip.invariant.group.p0i16(i16* %c1)
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declare i16 addrspace(42)* @llvm.strip.invariant.group.p42i16(i16 addrspace(42)* %c1)
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attributes #0 = { "null-pointer-is-valid"="true" }
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