Fix PR4419: handle defs of partial uses.

[oota-llvm.git] / test / CodeGen / ARM / 2009-06-19-RegScavengerAssert.ll

diff --git a/test/CodeGen/ARM/2009-06-19-RegScavengerAssert.ll b/test/CodeGen/ARM/2009-06-19-RegScavengerAssert.ll
new file mode 100644 (file)
index 0000000..cbe2385
--- /dev/null
+++ b/test/CodeGen/ARM/2009-06-19-RegScavengerAssert.ll
@@ -0,0 +1,30 @@
+; RUN: llvm-as < %s | llc -mtriple=armv6-eabi -mattr=+vfp2 -float-abi=hard
+; PR4419
+
+define float @__ieee754_acosf(float %x) nounwind {
+entry:
+       br i1 undef, label %bb, label %bb4
+
+bb:            ; preds = %entry
+       ret float undef
+
+bb4:           ; preds = %entry
+       br i1 undef, label %bb5, label %bb6
+
+bb5:           ; preds = %bb4
+       ret float undef
+
+bb6:           ; preds = %bb4
+       br i1 undef, label %bb11, label %bb12
+
+bb11:          ; preds = %bb6
+       %0 = tail call float @__ieee754_sqrtf(float undef) nounwind             ; <float> [#uses=1]
+       %1 = fmul float %0, -2.000000e+00               ; <float> [#uses=1]
+       %2 = fadd float %1, 0x400921FB40000000          ; <float> [#uses=1]
+       ret float %2
+
+bb12:          ; preds = %bb6
+       ret float undef
+}
+
+declare float @__ieee754_sqrtf(float)