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| author | Eric Christopher <echristo@apple.com> | 2011-01-11 00:16:04 +0000 |
|---|---|---|
| committer | Eric Christopher <echristo@apple.com> | 2011-01-11 00:16:04 +0000 |
| commit | 3904343c68926f1ed8250e4a9b0863868f1ffb74 (patch) | |
| tree | 28410e2017bbd22e8783d802c65349c55a42de20 /llvm/test/CodeGen | |
| parent | bd4520b53523634d20bb56bb40a40d56125260fe (diff) | |
| download | bcm5719-llvm-3904343c68926f1ed8250e4a9b0863868f1ffb74.tar.gz bcm5719-llvm-3904343c68926f1ed8250e4a9b0863868f1ffb74.zip | |
Even if we don't have 7 bytes of stack space we may need to save and
restore the stack pointer from the frame pointer on thumbv6.
Fixes rdar://8819685
llvm-svn: 123196
Diffstat (limited to 'llvm/test/CodeGen')
| -rw-r--r-- | llvm/test/CodeGen/ARM/thumb1-varalloc.ll | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/ARM/thumb1-varalloc.ll b/llvm/test/CodeGen/ARM/thumb1-varalloc.ll new file mode 100644 index 00000000000..25093fee225 --- /dev/null +++ b/llvm/test/CodeGen/ARM/thumb1-varalloc.ll @@ -0,0 +1,40 @@ +; RUN: llc < %s -mtriple=thumbv6-apple-darwin | FileCheck %s +; rdar://8819685 + +@__bar = external hidden global i8* +@__baz = external hidden global i8* + +define i8* @_foo() { +entry: +; CHECK: foo: + + %size = alloca i32, align 4 + %0 = load i8** @__bar, align 4 + %1 = icmp eq i8* %0, null + br i1 %1, label %bb1, label %bb3 + +bb1: + store i32 1026, i32* %size, align 4 + %2 = alloca [1026 x i8], align 1 +; CHECK: mov r0, sp +; CHECK: adds r4, r0, r4 + %3 = getelementptr inbounds [1026 x i8]* %2, i32 0, i32 0 + %4 = call i32 @_called_func(i8* %3, i32* %size) nounwind + %5 = icmp eq i32 %4, 0 + br i1 %5, label %bb2, label %bb3 + +bb2: + %6 = call i8* @strdup(i8* %3) nounwind + store i8* %6, i8** @__baz, align 4 + br label %bb3 + +bb3: + %.0 = phi i8* [ %0, %entry ], [ %6, %bb2 ], [ %3, %bb1 ] +; CHECK: subs r4, #5 +; CHECK-NEXT: mov sp, r4 +; CHECK-NEXT: pop {r4, r5, r6, r7, pc} + ret i8* %.0 +} + +declare noalias i8* @strdup(i8* nocapture) nounwind +declare i32 @_called_func(i8*, i32*) nounwind
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