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cf8f942514
This can save a 32-bit immediate move. We would shrink the load and fold it if it was non-volatile, but that's trickier to check for. llvm-svn: 359129
26 lines
857 B
LLVM
26 lines
857 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-- | FileCheck %s
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; PR2835
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@g_407 = internal global i32 0 ; <i32*> [#uses=1]
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@llvm.used = appending global [1 x i8*] [ i8* bitcast (i32 ()* @main to i8*) ], section "llvm.metadata" ; <[1 x i8*]*> [#uses=0]
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define i32 @main() nounwind {
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; CHECK-LABEL: main:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: movl g_407, %eax
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; CHECK-NEXT: movzbl %al, %eax
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; CHECK-NEXT: pushl %eax
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; CHECK-NEXT: calll func_45
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; CHECK-NEXT: addl $4, %esp
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: retl
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entry:
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%0 = load volatile i32, i32* @g_407, align 4 ; <i32> [#uses=1]
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%1 = trunc i32 %0 to i8 ; <i8> [#uses=1]
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%2 = tail call i32 @func_45(i8 zeroext %1) nounwind ; <i32> [#uses=0]
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ret i32 0
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}
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declare i32 @func_45(i8 zeroext) nounwind
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