forked from OSchip/llvm-project
55 lines
1.4 KiB
LLVM
55 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-unknown-linux -enable-misched=false | FileCheck %s
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;; Simple case
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define i32 @test1(i8 %x) nounwind readnone {
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; CHECK-LABEL: test1:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movzbl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: andl $224, %eax
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; CHECK-NEXT: retl
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%A = and i8 %x, -32
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%B = zext i8 %A to i32
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ret i32 %B
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}
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;; Multiple uses of %x but easily extensible.
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define i32 @test2(i8 %x) nounwind readnone {
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; CHECK-LABEL: test2:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movzbl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movl %eax, %ecx
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; CHECK-NEXT: andl $224, %ecx
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; CHECK-NEXT: orl $63, %eax
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; CHECK-NEXT: addl %ecx, %eax
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; CHECK-NEXT: retl
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%A = and i8 %x, -32
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%B = zext i8 %A to i32
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%C = or i8 %x, 63
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%D = zext i8 %C to i32
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%E = add i32 %B, %D
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ret i32 %E
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}
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declare void @use(i32, i8)
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;; Multiple uses of %x where we shouldn't extend the load.
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define void @test3(i8 %x) nounwind readnone {
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; CHECK-LABEL: test3:
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; CHECK: # %bb.0:
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; CHECK-NEXT: subl $12, %esp
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; CHECK-NEXT: movzbl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: subl $8, %esp
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; CHECK-NEXT: pushl %eax
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; CHECK-NEXT: andl $224, %eax
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; CHECK-NEXT: pushl %eax
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; CHECK-NEXT: calll use
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; CHECK-NEXT: addl $28, %esp
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; CHECK-NEXT: retl
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%A = and i8 %x, -32
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%B = zext i8 %A to i32
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call void @use(i32 %B, i8 %x)
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ret void
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}
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