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InstCombine: Bitcast call arguments from/to pointer/integer type

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Try harder to get rid of bitcast'd calls by ptrtoint/inttoptr'ing
arguments and return values when DataLayout says it is safe to do so.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225254 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer
2015-01-06 08:41:31 +00:00
parent 6409bd68de
commit 51e4a66417
3 changed files with 56 additions and 8 deletions
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9
test/Transforms/InstCombine/apint-call-cast-target.ll
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@@ -5,15 +5,18 @@ target triple = "i686-pc-linux-gnu"
define i32 @main() {
; CHECK-LABEL: @main(
; CHECK: call i32 bitcast
; CHECK: %[[call:.*]] = call i7* @ctime(i999* null)
; CHECK: %[[cast:.*]] = ptrtoint i7* %[[call]] to i32
; CHECK: ret i32 %[[cast]]
entry:
%tmp = call i32 bitcast (i7* (i999*)* @ctime to i32 (i99*)*)( i99* null )
ret i32 %tmp
}
define i7* @ctime(i999*) {
; CHECK-LABEL: @ctime(
; CHECK: call i7* bitcast
; CHECK-LABEL: define i7* @ctime(
; CHECK: %[[call:.*]] = call i32 @main()
; CHECK: %[[cast:.*]] = inttoptr i32 %[[call]] to i7*
entry:
%tmp = call i7* bitcast (i32 ()* @main to i7* ()*)( )
ret i7* %tmp