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llvm-project/llvm/test/CodeGen/X86/pr35399.ll

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[X86] Don't invert NewCC variable while processing the jcc/setcc/cmovcc instructions in optimizeCompareInstr. The NewCC variable is calculated outside of the loop that processes jcc/setcc/cmovcc instructions. If we invert it during the loop it can cause an incorrect value to be used by a later iteration. Instead only read it during the loop and use a new variable to store the possibly inverted value. Fixes PR35399. llvm-svn: 318934
2017-11-24 03:25:45 +08:00
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown -mattr=lzcnt | FileCheck %s
; Make sure we emit opoosite setcc instructions.
define i64 @pr35399(i64, i8*, i8*) {
; CHECK-LABEL: pr35399:
[CodeGen] Unify MBB reference format in both MIR and debug output As part of the unification of the debug format and the MIR format, print MBB references as '%bb.5'. The MIR printer prints the IR name of a MBB only for block definitions. * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)->getNumber\(\)/" << printMBBReference(*\1)/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)\.getNumber\(\)/" << printMBBReference(\1)/g' * find . \( -name "*.txt" -o -name "*.s" -o -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#([0-9]+)/%bb.\1/g' * grep -nr 'BB#' and fix Differential Revision: https://reviews.llvm.org/D40422 llvm-svn: 319665
2017-12-05 01:18:51 +08:00
; CHECK: # %bb.0:
[X86] Don't invert NewCC variable while processing the jcc/setcc/cmovcc instructions in optimizeCompareInstr. The NewCC variable is calculated outside of the loop that processes jcc/setcc/cmovcc instructions. If we invert it during the loop it can cause an incorrect value to be used by a later iteration. Instead only read it during the loop and use a new variable to store the possibly inverted value. Fixes PR35399. llvm-svn: 318934
2017-11-24 03:25:45 +08:00
; CHECK-NEXT: lzcntq %rdi, %rax
; CHECK-NEXT: setae (%rsi)
; CHECK-NEXT: setb (%rdx)
; CHECK-NEXT: retq
%4 = tail call i64 @llvm.ctlz.i64(i64 %0, i1 false)
%5 = icmp ne i64 %0, 0
%6 = zext i1 %5 to i8
store i8 %6, i8* %1, align 1
%7 = xor i1 %5, true
%8 = zext i1 %7 to i8
store i8 %8, i8* %2, align 1
ret i64 %4
}
declare i64 @llvm.ctlz.i64(i64, i1)