Test case for PR2082.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47501 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/2008-02-22-LocalRegAllocBug.ll b/test/CodeGen/X86/2008-02-22-LocalRegAllocBug.ll
new file mode 100644 (file)
index 0000000..ebe60ad
--- /dev/null
+++ b/test/CodeGen/X86/2008-02-22-LocalRegAllocBug.ll
@@ -0,0 +1,55 @@
+; RUN: llvm-as < %s | llc -regalloc=local -mattr=+mmx | grep esi
+; PR2082
+; Local register allocator was refusing to use ESI, EDI, and EBP so it ran out of
+; registers.
+define void @transpose4x4(i8* %dst, i8* %src, i32 %dst_stride, i32 %src_stride) {
+entry:
+       %dst_addr = alloca i8*          ; <i8**> [#uses=5]
+       %src_addr = alloca i8*          ; <i8**> [#uses=5]
+       %dst_stride_addr = alloca i32           ; <i32*> [#uses=4]
+       %src_stride_addr = alloca i32           ; <i32*> [#uses=4]
+       %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+       store i8* %dst, i8** %dst_addr
+       store i8* %src, i8** %src_addr
+       store i32 %dst_stride, i32* %dst_stride_addr
+       store i32 %src_stride, i32* %src_stride_addr
+       %tmp = load i8** %dst_addr, align 4             ; <i8*> [#uses=1]
+       %tmp1 = getelementptr i8* %tmp, i32 0           ; <i8*> [#uses=1]
+       %tmp12 = bitcast i8* %tmp1 to i32*              ; <i32*> [#uses=1]
+       %tmp3 = load i8** %dst_addr, align 4            ; <i8*> [#uses=1]
+       %tmp4 = load i32* %dst_stride_addr, align 4             ; <i32> [#uses=1]
+       %tmp5 = getelementptr i8* %tmp3, i32 %tmp4              ; <i8*> [#uses=1]
+       %tmp56 = bitcast i8* %tmp5 to i32*              ; <i32*> [#uses=1]
+       %tmp7 = load i32* %dst_stride_addr, align 4             ; <i32> [#uses=1]
+       %tmp8 = mul i32 %tmp7, 2                ; <i32> [#uses=1]
+       %tmp9 = load i8** %dst_addr, align 4            ; <i8*> [#uses=1]
+       %tmp10 = getelementptr i8* %tmp9, i32 %tmp8             ; <i8*> [#uses=1]
+       %tmp1011 = bitcast i8* %tmp10 to i32*           ; <i32*> [#uses=1]
+       %tmp13 = load i32* %dst_stride_addr, align 4            ; <i32> [#uses=1]
+       %tmp14 = mul i32 %tmp13, 3              ; <i32> [#uses=1]
+       %tmp15 = load i8** %dst_addr, align 4           ; <i8*> [#uses=1]
+       %tmp16 = getelementptr i8* %tmp15, i32 %tmp14           ; <i8*> [#uses=1]
+       %tmp1617 = bitcast i8* %tmp16 to i32*           ; <i32*> [#uses=1]
+       %tmp18 = load i8** %src_addr, align 4           ; <i8*> [#uses=1]
+       %tmp19 = getelementptr i8* %tmp18, i32 0                ; <i8*> [#uses=1]
+       %tmp1920 = bitcast i8* %tmp19 to i32*           ; <i32*> [#uses=1]
+       %tmp21 = load i8** %src_addr, align 4           ; <i8*> [#uses=1]
+       %tmp22 = load i32* %src_stride_addr, align 4            ; <i32> [#uses=1]
+       %tmp23 = getelementptr i8* %tmp21, i32 %tmp22           ; <i8*> [#uses=1]
+       %tmp2324 = bitcast i8* %tmp23 to i32*           ; <i32*> [#uses=1]
+       %tmp25 = load i32* %src_stride_addr, align 4            ; <i32> [#uses=1]
+       %tmp26 = mul i32 %tmp25, 2              ; <i32> [#uses=1]
+       %tmp27 = load i8** %src_addr, align 4           ; <i8*> [#uses=1]
+       %tmp28 = getelementptr i8* %tmp27, i32 %tmp26           ; <i8*> [#uses=1]
+       %tmp2829 = bitcast i8* %tmp28 to i32*           ; <i32*> [#uses=1]
+       %tmp30 = load i32* %src_stride_addr, align 4            ; <i32> [#uses=1]
+       %tmp31 = mul i32 %tmp30, 3              ; <i32> [#uses=1]
+       %tmp32 = load i8** %src_addr, align 4           ; <i8*> [#uses=1]
+       %tmp33 = getelementptr i8* %tmp32, i32 %tmp31           ; <i8*> [#uses=1]
+       %tmp3334 = bitcast i8* %tmp33 to i32*           ; <i32*> [#uses=1]
+       call void asm sideeffect "movd  $4, %mm0                \0A\09movd  $5, %mm1                \0A\09movd  $6, %mm2                \0A\09movd  $7, %mm3                \0A\09punpcklbw %mm1, %mm0         \0A\09punpcklbw %mm3, %mm2         \0A\09movq %mm0, %mm1              \0A\09punpcklwd %mm2, %mm0         \0A\09punpckhwd %mm2, %mm1         \0A\09movd  %mm0, $0                \0A\09punpckhdq %mm0, %mm0         \0A\09movd  %mm0, $1                \0A\09movd  %mm1, $2                \0A\09punpckhdq %mm1, %mm1         \0A\09movd  %mm1, $3                \0A\09", "=*m,=*m,=*m,=*m,*m,*m,*m,*m,~{dirflag},~{fpsr},~{flags}"( i32* %tmp12, i32* %tmp56, i32* %tmp1011, i32* %tmp1617, i32* %tmp1920, i32* %tmp2324, i32* %tmp2829, i32* %tmp3334 ) nounwind 
+       br label %return
+
+return:                ; preds = %entry
+       ret void
+}