57 lines
2.2 KiB
LLVM
57 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes='instcombine,simplifycfg' -S < %s | FileCheck %s
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@.str = private constant [7 x i8] c"abcdef\00", align 1
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declare ptr @memchr(ptr noundef, i32 noundef, i64 noundef)
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declare i32 @foo()
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define i32 @memchr_to_switch_br(i32 %a) {
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; CHECK-LABEL: @memchr_to_switch_br(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CALL:%.*]] = call ptr @memchr(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef [[A:%.*]], i64 noundef 6)
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; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq ptr [[CALL]], null
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; CHECK-NEXT: br i1 [[CMP_NOT]], label [[RETURN:%.*]], label [[IF_THEN:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: [[CALL1:%.*]] = call i32 @foo()
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; CHECK-NEXT: br label [[RETURN]]
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; CHECK: return:
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; CHECK-NEXT: [[RETVAL_0:%.*]] = phi i32 [ [[CALL1]], [[IF_THEN]] ], [ -1, [[ENTRY:%.*]] ]
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; CHECK-NEXT: ret i32 [[RETVAL_0]]
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;
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entry:
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%call = call ptr @memchr(ptr noundef nonnull @.str, i32 noundef %a, i64 noundef 6) #3
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%cmp.not = icmp eq ptr %call, null
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br i1 %cmp.not, label %return, label %if.then
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if.then: ; preds = %entry
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%call1 = call i32 @foo() #3
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br label %return
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return: ; preds = %entry, %if.then
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%retval.0 = phi i32 [ %call1, %if.then ], [ -1, %entry ]
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ret i32 %retval.0
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}
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define i1 @memchr_to_switch_eq_ret(i32 %c) {
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; CHECK-LABEL: @memchr_to_switch_eq_ret(
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; CHECK-NEXT: [[P:%.*]] = tail call ptr @memchr(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef [[C:%.*]], i64 noundef 6)
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; CHECK-NEXT: [[RET:%.*]] = icmp eq ptr [[P]], null
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%p = tail call ptr @memchr(ptr noundef nonnull @.str, i32 noundef %c, i64 noundef 6)
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%ret = icmp eq ptr %p, null
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ret i1 %ret
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}
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define i1 @memchr_to_switch_ne_ret(i32 %c) {
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; CHECK-LABEL: @memchr_to_switch_ne_ret(
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; CHECK-NEXT: [[P:%.*]] = tail call ptr @memchr(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef [[C:%.*]], i64 noundef 6)
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; CHECK-NEXT: [[RET:%.*]] = icmp ne ptr [[P]], null
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%p = tail call ptr @memchr(ptr noundef nonnull @.str, i32 noundef %c, i64 noundef 6)
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%ret = icmp ne ptr %p, null
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ret i1 %ret
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}
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