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rename test.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112234 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-08-26 22:20:47 +00:00
parent 26dbe7ec18
commit 681ccf40d7
1 changed files with 0 additions and 0 deletions
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38
test/Transforms/InstCombine/trunc.ll Normal file
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@@ -0,0 +1,38 @@
; RUN: opt < %s -instcombine -S > %t
; RUN: not grep zext %t
; RUN: not grep sext %t
; Instcombine should be able to eliminate all of these ext casts.
declare void @use(i32)
define i64 @foo(i64 %a) {
%b = trunc i64 %a to i32
%c = and i32 %b, 15
%d = zext i32 %c to i64
call void @use(i32 %b)
ret i64 %d
}
define i64 @bar(i64 %a) {
%b = trunc i64 %a to i32
%c = shl i32 %b, 4
%q = ashr i32 %c, 4
%d = sext i32 %q to i64
call void @use(i32 %b)
ret i64 %d
}
define i64 @goo(i64 %a) {
%b = trunc i64 %a to i32
%c = and i32 %b, 8
%d = zext i32 %c to i64
call void @use(i32 %b)
ret i64 %d
}
define i64 @hoo(i64 %a) {
%b = trunc i64 %a to i32
%c = and i32 %b, 8
%x = xor i32 %c, 8
%d = zext i32 %x to i64
call void @use(i32 %b)
ret i64 %d
}