derek.holloway
7502bf64a4
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37 lines
1.6 KiB
LLVM
37 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; Regression test for https://bugs.llvm.org/show_bug.cgi?id=32842
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;
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; RUN: opt < %s -S -passes=msan 2>&1 | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Make sure the shadow of the (x < y) comparison isn't truncated to i1.
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define zeroext i1 @_Z1fii(i32 %x, i32 %y) sanitize_memory {
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; CHECK-LABEL: define zeroext i1 @_Z1fii(
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; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr @__msan_param_tls, align 8
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; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr getelementptr (i8, ptr @__msan_param_tls, i64 8), align 8
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; CHECK-NEXT: call void @llvm.donothing()
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; CHECK-NEXT: [[TMP10:%.*]] = xor i32 [[X]], -2147483648
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; CHECK-NEXT: [[TMP3:%.*]] = xor i32 [[TMP0]], -1
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; CHECK-NEXT: [[TMP4:%.*]] = and i32 [[TMP10]], [[TMP3]]
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; CHECK-NEXT: [[TMP5:%.*]] = or i32 [[TMP10]], [[TMP0]]
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; CHECK-NEXT: [[TMP6:%.*]] = xor i32 [[Y]], -2147483648
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; CHECK-NEXT: [[TMP7:%.*]] = xor i32 [[TMP1]], -1
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; CHECK-NEXT: [[TMP8:%.*]] = and i32 [[TMP6]], [[TMP7]]
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; CHECK-NEXT: [[TMP9:%.*]] = or i32 [[TMP6]], [[TMP1]]
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; CHECK-NEXT: [[TMP14:%.*]] = icmp ult i32 [[TMP4]], [[TMP9]]
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; CHECK-NEXT: [[TMP27:%.*]] = icmp ult i32 [[TMP5]], [[TMP8]]
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; CHECK-NEXT: [[TMP2:%.*]] = xor i1 [[TMP14]], [[TMP27]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[X]], [[Y]]
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; CHECK-NEXT: store i1 [[TMP2]], ptr @__msan_retval_tls, align 8
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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entry:
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%cmp = icmp slt i32 %x, %y
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ret i1 %cmp
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}
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