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If fast-isel fails, remove dead instructions generated during the failed

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attempt.  

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145425 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chad Rosier
2011-11-29 19:40:47 +00:00
parent dda8c6ff9e
commit ae6f2cb1fc
3 changed files with 54 additions and 0 deletions
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23
test/CodeGen/ARM/fast-isel-deadcode.ll Normal file
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@@ -0,0 +1,23 @@
; RUN: llc < %s -O0 -relocation-model=dynamic-no-pic -mtriple=thumbv7-apple-darwin | FileCheck %s --check-prefix=THUMB
; Target-specific selector can't properly handle the double because it isn't
; being passed via a register, so the materialized arguments become dead code.
define i32 @main(i32 %argc, i8** %argv) nounwind {
entry:
; THUMB: main
call void @printArgsNoRet(i32 1, float 0x4000CCCCC0000000, i8 signext 99, double 4.100000e+00)
; THUMB: blx _printArgsNoRet
; THUMB-NOT: ldr
; THUMB-NOT: vldr
; THUMB-NOT: vmov
; THUMB-NOT: ldr
; THUMB-NOT: sxtb
; THUMB: movs r0, #0
; THUMB: movt r0, #0
; THUMB: add sp, #32
; THUMb: pop {r7, pc}
ret i32 0
}
declare void @printArgsNoRet(i32 %a1, float %a2, i8 signext %a3, double %a4)