CodeGen peephole: fold redundant phys reg copies

[oota-llvm.git] / test / CodeGen / X86 / 2006-05-08-CoalesceSubRegClass.ll

diff --git a/test/CodeGen/X86/2006-05-08-CoalesceSubRegClass.ll b/test/CodeGen/X86/2006-05-08-CoalesceSubRegClass.ll
index 35efceed7c1f5f36beb9fddb56ac54c03621b05e..b70d375bf51ade024163d5b6e4f10c8ac5cd63fd 100644 (file)
--- a/test/CodeGen/X86/2006-05-08-CoalesceSubRegClass.ll
+++ b/test/CodeGen/X86/2006-05-08-CoalesceSubRegClass.ll
@@ -1,22 +1,25 @@
 ; Coalescing from R32 to a subset R32_. Once another register coalescer bug is
 ; fixed, the movb should go away as well.
 
-; RUN: llvm-as < %s | llc -march=x86 -relocation-model=static | grep 'movl' | wc -l
+; RUN: llc < %s -march=x86 -relocation-model=static | \
+; RUN:   grep movl
 
-%B = external global uint
-%C = external global ushort*
+@B = external global i32               ; <i32*> [#uses=2]
+@C = external global i16*              ; <i16**> [#uses=2]
 
-void %test(uint %A) {
-       %A = cast uint %A to ubyte
-       %tmp2 = load uint* %B
-       %tmp3 = and ubyte %A, 16
-       %tmp4 = shl uint %tmp2, ubyte %tmp3
-       store uint %tmp4, uint* %B
-       %tmp6 = shr uint %A, ubyte 3
-       %tmp = load ushort** %C
-       %tmp8 = cast ushort* %tmp to uint
-       %tmp9 = add uint %tmp8, %tmp6
-       %tmp9 = cast uint %tmp9 to ushort*
-       store ushort* %tmp9, ushort** %C
+define void @test(i32 %A) {
+       %A.upgrd.1 = trunc i32 %A to i8         ; <i8> [#uses=1]
+       %tmp2 = load i32, i32* @B               ; <i32> [#uses=1]
+       %tmp3 = and i8 %A.upgrd.1, 16           ; <i8> [#uses=1]
+       %shift.upgrd.2 = zext i8 %tmp3 to i32           ; <i32> [#uses=1]
+       %tmp4 = shl i32 %tmp2, %shift.upgrd.2           ; <i32> [#uses=1]
+       store i32 %tmp4, i32* @B
+       %tmp6 = lshr i32 %A, 3          ; <i32> [#uses=1]
+       %tmp = load i16*, i16** @C              ; <i16*> [#uses=1]
+       %tmp8 = ptrtoint i16* %tmp to i32               ; <i32> [#uses=1]
+       %tmp9 = add i32 %tmp8, %tmp6            ; <i32> [#uses=1]
+       %tmp9.upgrd.3 = inttoptr i32 %tmp9 to i16*              ; <i16*> [#uses=1]
+       store i16* %tmp9.upgrd.3, i16** @C
        ret void
 }
+