diff options
author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-12-18 00:11:44 +0000 |
---|---|---|
committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-12-18 00:11:44 +0000 |
commit | f8ad5bcdb5ce139d70902dbca7c2f6888f3beaec (patch) | |
tree | 1f7abcb9dfe9fb087c2efc09e57ada0505eaff68 /test/CodeGen/Thumb | |
parent | 6bec5bb344fc0374431aed1cb63418de607a1aec (diff) | |
download | external_llvm-f8ad5bcdb5ce139d70902dbca7c2f6888f3beaec.zip external_llvm-f8ad5bcdb5ce139d70902dbca7c2f6888f3beaec.tar.gz external_llvm-f8ad5bcdb5ce139d70902dbca7c2f6888f3beaec.tar.bz2 |
Add test case for the phi reuse patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91642 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/Thumb')
-rw-r--r-- | test/CodeGen/Thumb/2009-12-17-pre-regalloc-taildup.ll | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/test/CodeGen/Thumb/2009-12-17-pre-regalloc-taildup.ll b/test/CodeGen/Thumb/2009-12-17-pre-regalloc-taildup.ll new file mode 100644 index 0000000..3401915 --- /dev/null +++ b/test/CodeGen/Thumb/2009-12-17-pre-regalloc-taildup.ll @@ -0,0 +1,66 @@ +; RUN: llc -O3 -pre-regalloc-taildup < %s | FileCheck %s +target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32" +target triple = "thumbv7-apple-darwin10" + +; This test should not produce any spills, even when tail duplication creates lots of phi nodes. +; CHECK-NOT: push +; CHECK-NOT: pop +; CHECK: bx lr + +@codetable.2928 = internal constant [5 x i8*] [i8* blockaddress(@interpret_threaded, %RETURN), i8* blockaddress(@interpret_threaded, %INCREMENT), i8* blockaddress(@interpret_threaded, %DECREMENT), i8* blockaddress(@interpret_threaded, %DOUBLE), i8* blockaddress(@interpret_threaded, %SWAPWORD)] ; <[5 x i8*]*> [#uses=5] +@llvm.used = appending global [1 x i8*] [i8* bitcast (i32 (i8*)* @interpret_threaded to i8*)], section "llvm.metadata" ; <[1 x i8*]*> [#uses=0] + +define arm_apcscc i32 @interpret_threaded(i8* nocapture %opcodes) nounwind readonly optsize { +entry: + %0 = load i8* %opcodes, align 1 ; <i8> [#uses=1] + %1 = zext i8 %0 to i32 ; <i32> [#uses=1] + %2 = getelementptr inbounds [5 x i8*]* @codetable.2928, i32 0, i32 %1 ; <i8**> [#uses=1] + br label %bb + +bb: ; preds = %bb.backedge, %entry + %indvar = phi i32 [ %phitmp, %bb.backedge ], [ 1, %entry ] ; <i32> [#uses=2] + %gotovar.22.0.in = phi i8** [ %gotovar.22.0.in.be, %bb.backedge ], [ %2, %entry ] ; <i8**> [#uses=1] + %result.0 = phi i32 [ %result.0.be, %bb.backedge ], [ 0, %entry ] ; <i32> [#uses=6] + %opcodes_addr.0 = getelementptr i8* %opcodes, i32 %indvar ; <i8*> [#uses=4] + %gotovar.22.0 = load i8** %gotovar.22.0.in, align 4 ; <i8*> [#uses=1] + indirectbr i8* %gotovar.22.0, [label %RETURN, label %INCREMENT, label %DECREMENT, label %DOUBLE, label %SWAPWORD] + +RETURN: ; preds = %bb + ret i32 %result.0 + +INCREMENT: ; preds = %bb + %3 = add nsw i32 %result.0, 1 ; <i32> [#uses=1] + %4 = load i8* %opcodes_addr.0, align 1 ; <i8> [#uses=1] + %5 = zext i8 %4 to i32 ; <i32> [#uses=1] + %6 = getelementptr inbounds [5 x i8*]* @codetable.2928, i32 0, i32 %5 ; <i8**> [#uses=1] + br label %bb.backedge + +bb.backedge: ; preds = %SWAPWORD, %DOUBLE, %DECREMENT, %INCREMENT + %gotovar.22.0.in.be = phi i8** [ %20, %SWAPWORD ], [ %14, %DOUBLE ], [ %10, %DECREMENT ], [ %6, %INCREMENT ] ; <i8**> [#uses=1] + %result.0.be = phi i32 [ %17, %SWAPWORD ], [ %11, %DOUBLE ], [ %7, %DECREMENT ], [ %3, %INCREMENT ] ; <i32> [#uses=1] + %phitmp = add i32 %indvar, 1 ; <i32> [#uses=1] + br label %bb + +DECREMENT: ; preds = %bb + %7 = add i32 %result.0, -1 ; <i32> [#uses=1] + %8 = load i8* %opcodes_addr.0, align 1 ; <i8> [#uses=1] + %9 = zext i8 %8 to i32 ; <i32> [#uses=1] + %10 = getelementptr inbounds [5 x i8*]* @codetable.2928, i32 0, i32 %9 ; <i8**> [#uses=1] + br label %bb.backedge + +DOUBLE: ; preds = %bb + %11 = shl i32 %result.0, 1 ; <i32> [#uses=1] + %12 = load i8* %opcodes_addr.0, align 1 ; <i8> [#uses=1] + %13 = zext i8 %12 to i32 ; <i32> [#uses=1] + %14 = getelementptr inbounds [5 x i8*]* @codetable.2928, i32 0, i32 %13 ; <i8**> [#uses=1] + br label %bb.backedge + +SWAPWORD: ; preds = %bb + %15 = shl i32 %result.0, 16 ; <i32> [#uses=1] + %16 = ashr i32 %result.0, 16 ; <i32> [#uses=1] + %17 = or i32 %15, %16 ; <i32> [#uses=1] + %18 = load i8* %opcodes_addr.0, align 1 ; <i8> [#uses=1] + %19 = zext i8 %18 to i32 ; <i32> [#uses=1] + %20 = getelementptr inbounds [5 x i8*]* @codetable.2928, i32 0, i32 %19 ; <i8**> [#uses=1] + br label %bb.backedge +} |