ce4fa93db8
Extended value is known to be inside range smaller than full one. Prevent SCCP to mark such value as overdefined. Fixes PR52253 Differential Revision: https://reviews.llvm.org/D112721
58 lines
1.6 KiB
LLVM
58 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -O3 -S < %s | FileCheck %s
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; RUN: opt -instcombine -sccp -bdce -S < %s | FileCheck %s
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; RUN: opt -aggressive-instcombine -instcombine -sccp -bdce -S < %s | FileCheck %s
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i1 @foo(i32 %t4, i32 %t10) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: ret i1 false
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;
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%t09 = shl i32 %t10, 24
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%t010 = ashr exact i32 %t09, 24
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%t011 = add nsw i32 %t010, 979
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%t11 = trunc i32 %t4 to i8
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%t12 = icmp eq i8 %t11, 0
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%t14 = zext i1 %t12 to i32
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%t15 = shl i32 %t4, %t14
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%t17 = and i32 %t15, 255
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%t18 = icmp eq i32 %t011, %t17
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ret i1 %t18
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}
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define i1 @bar(i32 %t4, i32 %t10) {
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; CHECK-LABEL: @bar(
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; CHECK-NEXT: ret i1 false
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;
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%t09 = shl i32 %t10, 24
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%t010 = ashr exact i32 %t09, 24
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%t011 = add nsw i32 %t010, 979
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%t11 = trunc i32 %t4 to i8
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%t12 = icmp eq i8 %t11, 0
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%t14 = zext i1 %t12 to i8
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%t15 = shl i8 %t11, %t14
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%t17 = zext i8 %t15 to i32
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%t18 = icmp eq i32 %t011, %t17
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ret i1 %t18
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}
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define i1 @foobar(i32 %t4, i32 %t10) {
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; CHECK-LABEL: @foobar(
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; CHECK-NEXT: ret i1 false
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;
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%t09 = shl i32 %t10, 24
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%t010 = ashr exact i32 %t09, 24
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%t011 = add nsw i32 %t010, 979
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%t11 = trunc i32 %t4 to i8
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%t12 = icmp eq i8 %t11, 0
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%t13 = zext i8 %t11 to i32
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%t14 = select i1 %t12, i32 1, i32 0
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%t15 = shl nuw nsw i32 %t13, %t14
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%t16 = trunc i32 %t15 to i8
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%t17 = zext i8 %t16 to i32
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%t18 = icmp eq i32 %t011, %t17
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ret i1 %t18
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}
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