Fix codegen for references to available_externally symbols. This fixes
PR4482.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74613 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/PowerPC/available-externally.ll b/test/CodeGen/PowerPC/available-externally.ll
new file mode 100644
index 0000000..cfad6ea
--- /dev/null
+++ b/test/CodeGen/PowerPC/available-externally.ll
@@ -0,0 +1,69 @@
+; RUN: llvm-as < %s | llc | grep {bl L_exact_log2.stub}
+; PR4482
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "powerpc-apple-darwin8"
+
+define i32 @foo(i64 %x) nounwind {
+entry:
+ %x_addr = alloca i64 ; <i64*> [#uses=2]
+ %retval = alloca i32 ; <i32*> [#uses=2]
+ %0 = alloca i32 ; <i32*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store i64 %x, i64* %x_addr
+ %1 = load i64* %x_addr, align 8 ; <i64> [#uses=1]
+ %2 = call i32 @exact_log2(i64 %1) nounwind ; <i32> [#uses=1]
+ store i32 %2, i32* %0, align 4
+ %3 = load i32* %0, align 4 ; <i32> [#uses=1]
+ store i32 %3, i32* %retval, align 4
+ br label %return
+
+return: ; preds = %entry
+ %retval1 = load i32* %retval ; <i32> [#uses=1]
+ ret i32 %retval1
+}
+
+define available_externally i32 @exact_log2(i64 %x) nounwind {
+entry:
+ %x_addr = alloca i64 ; <i64*> [#uses=6]
+ %retval = alloca i32 ; <i32*> [#uses=2]
+ %iftmp.0 = alloca i32 ; <i32*> [#uses=3]
+ %0 = alloca i32 ; <i32*> [#uses=2]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ store i64 %x, i64* %x_addr
+ %1 = load i64* %x_addr, align 8 ; <i64> [#uses=1]
+ %2 = sub i64 0, %1 ; <i64> [#uses=1]
+ %3 = load i64* %x_addr, align 8 ; <i64> [#uses=1]
+ %4 = and i64 %2, %3 ; <i64> [#uses=1]
+ %5 = load i64* %x_addr, align 8 ; <i64> [#uses=1]
+ %6 = icmp ne i64 %4, %5 ; <i1> [#uses=1]
+ br i1 %6, label %bb2, label %bb
+
+bb: ; preds = %entry
+ %7 = load i64* %x_addr, align 8 ; <i64> [#uses=1]
+ %8 = icmp eq i64 %7, 0 ; <i1> [#uses=1]
+ br i1 %8, label %bb2, label %bb1
+
+bb1: ; preds = %bb
+ %9 = load i64* %x_addr, align 8 ; <i64> [#uses=1]
+ %10 = call i64 @llvm.cttz.i64(i64 %9) ; <i64> [#uses=1]
+ %11 = trunc i64 %10 to i32 ; <i32> [#uses=1]
+ store i32 %11, i32* %iftmp.0, align 4
+ br label %bb3
+
+bb2: ; preds = %bb, %entry
+ store i32 -1, i32* %iftmp.0, align 4
+ br label %bb3
+
+bb3: ; preds = %bb2, %bb1
+ %12 = load i32* %iftmp.0, align 4 ; <i32> [#uses=1]
+ store i32 %12, i32* %0, align 4
+ %13 = load i32* %0, align 4 ; <i32> [#uses=1]
+ store i32 %13, i32* %retval, align 4
+ br label %return
+
+return: ; preds = %bb3
+ %retval4 = load i32* %retval ; <i32> [#uses=1]
+ ret i32 %retval4
+}
+
+declare i64 @llvm.cttz.i64(i64) nounwind readnone