Exit with nice warnings when register allocator run out of registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63267 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/illegal-asm.ll b/test/CodeGen/X86/illegal-asm.ll
new file mode 100644
index 0000000..0e7dc59
--- /dev/null
+++ b/test/CodeGen/X86/illegal-asm.ll
@@ -0,0 +1,32 @@
+; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin -disable-fp-elim
+; XFAIL: *
+; Expected to run out of registers during allocation.
+; rdar://6251720
+
+ %struct.CABACContext = type { i32, i32, i8* }
+ %struct.H264Context = type { %struct.CABACContext, [460 x i8] }
+@coeff_abs_level_m1_offset = common global [6 x i32] zeroinitializer ; <[6 x i32]*> [#uses=1]
+@coeff_abs_level1_ctx = common global [8 x i8] zeroinitializer ; <[8 x i8]*> [#uses=1]
+
+define i32 @decode_cabac_residual(%struct.H264Context* %h, i32 %cat) nounwind {
+entry:
+ %0 = getelementptr [6 x i32]* @coeff_abs_level_m1_offset, i32 0, i32 %cat ; <i32*> [#uses=1]
+ %1 = load i32* %0, align 4 ; <i32> [#uses=1]
+ %2 = load i8* getelementptr ([8 x i8]* @coeff_abs_level1_ctx, i32 0, i32 0), align 1 ; <i8> [#uses=1]
+ %3 = zext i8 %2 to i32 ; <i32> [#uses=1]
+ %.sum = add i32 %3, %1 ; <i32> [#uses=1]
+ %4 = getelementptr %struct.H264Context* %h, i32 0, i32 1, i32 %.sum ; <i8*> [#uses=2]
+ %5 = getelementptr %struct.H264Context* %h, i32 0, i32 0, i32 0 ; <i32*> [#uses=2]
+ %6 = getelementptr %struct.H264Context* %h, i32 0, i32 0, i32 1 ; <i32*> [#uses=2]
+ %7 = getelementptr %struct.H264Context* %h, i32 0, i32 0, i32 2 ; <i8**> [#uses=2]
+ %8 = load i32* %5, align 4 ; <i32> [#uses=1]
+ %9 = load i32* %6, align 4 ; <i32> [#uses=1]
+ %10 = load i8* %4, align 4 ; <i8> [#uses=1]
+ %asmtmp = tail call { i32, i32, i32, i32 } asm sideeffect "#$0 $1 $2 $3 $4 $5", "=&{di},=r,=r,=*m,=&q,=*imr,1,2,*m,5,~{dirflag},~{fpsr},~{flags},~{cx}"(i8** %7, i8* %4, i32 %8, i32 %9, i8** %7, i8 %10) nounwind ; <{ i32, i32, i32, i32 }> [#uses=3]
+ %asmresult = extractvalue { i32, i32, i32, i32 } %asmtmp, 0 ; <i32> [#uses=1]
+ %asmresult1 = extractvalue { i32, i32, i32, i32 } %asmtmp, 1 ; <i32> [#uses=1]
+ store i32 %asmresult1, i32* %5
+ %asmresult2 = extractvalue { i32, i32, i32, i32 } %asmtmp, 2 ; <i32> [#uses=1]
+ store i32 %asmresult2, i32* %6
+ ret i32 %asmresult
+}