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llvm-mirror/test/CodeGen/X86/pr33828.ll
Simon Pilgrim 062a2c49e3 [X86] Avoid icmp undef in reduced tests
Because we don't currently simplify icmp with undef in DAG, bugpoint loves to introduce them during reduction.

This is a small step towards re-adding non-undef values into some of the simpler tests so that they should still test correctly and emit similar/same codegen.

Prep work for PR40800 ([SelectionDAG] Add UNDEF handling to SelectionDAG::FoldSetCC).

llvm-svn: 356076
2019-03-13 18:36:59 +00:00

49 lines
1.4 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown-unknown -mcpu=haswell | FileCheck %s --check-prefix=X86
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=haswell | FileCheck %s --check-prefix=X64
@var_580 = external local_unnamed_addr global i8, align 1
define void @foo(i8 %a0) {
; X86-LABEL: foo:
; X86: # %bb.0: # %entry
; X86-NEXT: movsbl var_580, %eax
; X86-NEXT: testl $-536870913, %eax # imm = 0xDFFFFFFF
; X86-NEXT: jne .LBB0_1
; X86-NEXT: # %bb.2: # %if.end13
; X86-NEXT: retl
; X86-NEXT: .LBB0_1: # %if.then11
;
; X64-LABEL: foo:
; X64: # %bb.0: # %entry
; X64-NEXT: movsbl {{.*}}(%rip), %eax
; X64-NEXT: testl $-536870913, %eax # imm = 0xDFFFFFFF
; X64-NEXT: jne .LBB0_1
; X64-NEXT: # %bb.2: # %if.end13
; X64-NEXT: retq
; X64-NEXT: .LBB0_1: # %if.then11
entry:
%tmp = icmp ugt i8 %a0, 60
%phitmp = zext i1 %tmp to i16
br label %if.end
if.end:
%tmp1 = load i8, i8* @var_580, align 1
%conv7 = sext i8 %tmp1 to i32
%conv8 = zext i16 %phitmp to i32
%mul = shl nuw nsw i32 %conv8, 1
%div9 = udiv i32 %mul, 71
%sub = add nsw i32 %div9, -3
%shl = shl i32 1, %sub
%neg = xor i32 %shl, -1
%and = and i32 %neg, %conv7
%tobool10 = icmp eq i32 %and, 0
br i1 %tobool10, label %if.end13, label %if.then11
if.then11:
unreachable
if.end13:
ret void
}