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cf8ee33937
The "null-pointer-is-valid" attribute needs to be checked by many pointer-related combines. To make the check more efficient, convert it from a string into an enum attribute. In the future, this attribute may be replaced with data layout properties. Differential Revision: https://reviews.llvm.org/D78862
56 lines
1.5 KiB
LLVM
56 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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declare i8* @memrchr(i8*, i32, i32)
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define i8* @test1(i8* %str, i32 %c, i32 %n) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[RET:%.*]] = call i8* @memrchr(i8* [[STR:%.*]], i32 [[C:%.*]], i32 [[N:%.*]])
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; CHECK-NEXT: ret i8* [[RET]]
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;
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%ret = call i8* @memrchr(i8* %str, i32 %c, i32 %n)
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ret i8* %ret
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}
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define i8* @test2(i8* %str, i32 %c, i32 %n) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[RET:%.*]] = call i8* @memrchr(i8* nonnull [[STR:%.*]], i32 [[C:%.*]], i32 [[N:%.*]])
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; CHECK-NEXT: ret i8* [[RET]]
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;
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%ret = call i8* @memrchr(i8* nonnull %str, i32 %c, i32 %n)
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ret i8* %ret
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}
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define i8* @test3(i8* %str, i32 %c) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[RET:%.*]] = call i8* @memrchr(i8* [[STR:%.*]], i32 [[C:%.*]], i32 5)
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; CHECK-NEXT: ret i8* [[RET]]
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;
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%ret = call i8* @memrchr(i8* %str, i32 %c, i32 5)
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ret i8* %ret
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}
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define i8* @test4(i8* %str, i32 %c) null_pointer_is_valid {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[RET:%.*]] = call i8* @memrchr(i8* [[STR:%.*]], i32 [[C:%.*]], i32 5)
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; CHECK-NEXT: ret i8* [[RET]]
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;
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%ret = call i8* @memrchr(i8* %str, i32 %c, i32 5)
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ret i8* %ret
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}
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define i8* @test5(i8* %str, i32 %c) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: [[RET:%.*]] = call i8* @memrchr(i8* [[STR:%.*]], i32 [[C:%.*]], i32 0)
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; CHECK-NEXT: ret i8* [[RET]]
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;
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%ret = call i8* @memrchr(i8* %str, i32 %c, i32 0)
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ret i8* %ret
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}
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