derek.holloway
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55 lines
2.4 KiB
LLVM
55 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -passes='drop-unnecessary-assumes' -S %s | FileCheck %s
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; RUN: opt -passes='drop-unnecessary-assumes<drop-deref>' -S %s | FileCheck --check-prefix=DROP-DEREF %s
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declare void @use(ptr)
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define i8 @test_dereferenceable_assume_ptr_not_used(ptr %p, i64 %size) {
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; CHECK-LABEL: define i8 @test_dereferenceable_assume_ptr_not_used(
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; CHECK-SAME: ptr [[P:%.*]], i64 [[SIZE:%.*]]) {
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; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 [[SIZE]]) ]
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; CHECK-NEXT: ret i8 0
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;
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; DROP-DEREF-LABEL: define i8 @test_dereferenceable_assume_ptr_not_used(
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; DROP-DEREF-SAME: ptr [[P:%.*]], i64 [[SIZE:%.*]]) {
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; DROP-DEREF-NEXT: ret i8 0
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;
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call void @llvm.assume(i1 true) [ "dereferenceable"(ptr %p, i64 %size) ]
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ret i8 0
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}
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define i8 @test_dereferenceable_assume_ptr_used_variable_size(ptr %p, i64 %size) {
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; CHECK-LABEL: define i8 @test_dereferenceable_assume_ptr_used_variable_size(
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; CHECK-SAME: ptr [[P:%.*]], i64 [[SIZE:%.*]]) {
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; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 [[SIZE]]) ]
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; CHECK-NEXT: [[VAL:%.*]] = load i8, ptr [[P]], align 1
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; CHECK-NEXT: ret i8 [[VAL]]
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;
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; DROP-DEREF-LABEL: define i8 @test_dereferenceable_assume_ptr_used_variable_size(
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; DROP-DEREF-SAME: ptr [[P:%.*]], i64 [[SIZE:%.*]]) {
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; DROP-DEREF-NEXT: [[VAL:%.*]] = load i8, ptr [[P]], align 1
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; DROP-DEREF-NEXT: ret i8 [[VAL]]
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;
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call void @llvm.assume(i1 true) [ "dereferenceable"(ptr %p, i64 %size) ]
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%val = load i8, ptr %p
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ret i8 %val
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}
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define i8 @test_dereferenceable_with_align_ptr_used(ptr %p, i64 %size) {
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; CHECK-LABEL: define i8 @test_dereferenceable_with_align_ptr_used(
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; CHECK-SAME: ptr [[P:%.*]], i64 [[SIZE:%.*]]) {
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; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 [[SIZE]]), "align"(ptr [[P]], i64 8) ]
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; CHECK-NEXT: [[VAL:%.*]] = load i8, ptr [[P]], align 1
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; CHECK-NEXT: ret i8 [[VAL]]
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;
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; DROP-DEREF-LABEL: define i8 @test_dereferenceable_with_align_ptr_used(
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; DROP-DEREF-SAME: ptr [[P:%.*]], i64 [[SIZE:%.*]]) {
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; DROP-DEREF-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 8) ]
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; DROP-DEREF-NEXT: [[VAL:%.*]] = load i8, ptr [[P]], align 1
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; DROP-DEREF-NEXT: ret i8 [[VAL]]
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;
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call void @llvm.assume(i1 true) [ "dereferenceable"(ptr %p, i64 %size), "align"(ptr %p, i64 8) ]
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%val = load i8, ptr %p
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ret i8 %val
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}
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