diff options
Diffstat (limited to 'llvm/test/Transforms/SimplifyCFG/X86/disable-lookup-table.ll')
| -rw-r--r-- | llvm/test/Transforms/SimplifyCFG/X86/disable-lookup-table.ll | 53 |
1 files changed, 41 insertions, 12 deletions
diff --git a/llvm/test/Transforms/SimplifyCFG/X86/disable-lookup-table.ll b/llvm/test/Transforms/SimplifyCFG/X86/disable-lookup-table.ll index a8758a789ec..423d9462433 100644 --- a/llvm/test/Transforms/SimplifyCFG/X86/disable-lookup-table.ll +++ b/llvm/test/Transforms/SimplifyCFG/X86/disable-lookup-table.ll @@ -1,19 +1,36 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt < %s -simplifycfg -switch-to-lookup -S -mtriple=x86_64-unknown-linux-gnu | FileCheck %s ; RUN: opt < %s -passes='simplify-cfg<switch-to-lookup>' -S -mtriple=x86_64-unknown-linux-gnu | FileCheck %s ; In the presence of "-no-jump-tables"="true", simplifycfg should not convert switches to lookup tables. -; CHECK: @switch.table.bar = private unnamed_addr constant [4 x i32] [i32 55, i32 123, i32 0, i32 -1] -; CHECK-LABEL: foo -; CHECK-NOT: @switch.table.foo = private unnamed_addr constant [4 x i32] [i32 55, i32 123, i32 0, i32 -1] - define i32 @foo(i32 %c) "no-jump-tables"="true" { +; CHECK-LABEL: @foo( +; CHECK-NEXT: entry: +; CHECK-NEXT: switch i32 [[C:%.*]], label [[SW_DEFAULT:%.*]] [ +; CHECK-NEXT: i32 42, label [[RETURN:%.*]] +; CHECK-NEXT: i32 43, label [[SW_BB1:%.*]] +; CHECK-NEXT: i32 44, label [[SW_BB2:%.*]] +; CHECK-NEXT: i32 45, label [[SW_BB3:%.*]] +; CHECK-NEXT: ] +; CHECK: sw.bb1: +; CHECK-NEXT: br label [[RETURN]] +; CHECK: sw.bb2: +; CHECK-NEXT: br label [[RETURN]] +; CHECK: sw.bb3: +; CHECK-NEXT: br label [[RETURN]] +; CHECK: sw.default: +; CHECK-NEXT: br label [[RETURN]] +; CHECK: return: +; CHECK-NEXT: [[RETVAL_0:%.*]] = phi i32 [ 15, [[SW_DEFAULT]] ], [ -1, [[SW_BB3]] ], [ 0, [[SW_BB2]] ], [ 123, [[SW_BB1]] ], [ 55, [[ENTRY:%.*]] ] +; CHECK-NEXT: ret i32 [[RETVAL_0]] +; entry: switch i32 %c, label %sw.default [ - i32 42, label %return - i32 43, label %sw.bb1 - i32 44, label %sw.bb2 - i32 45, label %sw.bb3 + i32 42, label %return + i32 43, label %sw.bb1 + i32 44, label %sw.bb2 + i32 45, label %sw.bb3 ] sw.bb1: br label %return @@ -27,12 +44,24 @@ return: define i32 @bar(i32 %c) { +; CHECK-LABEL: @bar( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[SWITCH_TABLEIDX:%.*]] = sub i32 [[C:%.*]], 42 +; CHECK-NEXT: [[TMP0:%.*]] = icmp ult i32 [[SWITCH_TABLEIDX]], 4 +; CHECK-NEXT: br i1 [[TMP0]], label [[SWITCH_LOOKUP:%.*]], label [[RETURN:%.*]] +; CHECK: switch.lookup: +; CHECK-NEXT: [[SWITCH_GEP:%.*]] = getelementptr inbounds [4 x i32], [4 x i32]* @switch.table.bar, i32 0, i32 [[SWITCH_TABLEIDX]] +; CHECK-NEXT: [[SWITCH_LOAD:%.*]] = load i32, i32* [[SWITCH_GEP]] +; CHECK-NEXT: ret i32 [[SWITCH_LOAD]] +; CHECK: return: +; CHECK-NEXT: ret i32 15 +; entry: switch i32 %c, label %sw.default [ - i32 42, label %return - i32 43, label %sw.bb1 - i32 44, label %sw.bb2 - i32 45, label %sw.bb3 + i32 42, label %return + i32 43, label %sw.bb1 + i32 44, label %sw.bb2 + i32 45, label %sw.bb3 ] sw.bb1: br label %return |
