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| author | Dan Gohman <gohman@apple.com> | 2009-04-09 03:51:29 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-04-09 03:51:29 +0000 |
| commit | 57fc82d409022e793446c1c5d7d6d8b0d7579f83 (patch) | |
| tree | 97ab2b8425ae0bcfaf3f82b3d7fd79208f68f716 /test/CodeGen/X86/switch-zextload.ll | |
| parent | 7d770be047059d624f37c6fb1e5b1d0f2b4961b3 (diff) | |
| download | llvm-57fc82d409022e793446c1c5d7d6d8b0d7579f83.tar.gz llvm-57fc82d409022e793446c1c5d7d6d8b0d7579f83.tar.bz2 llvm-57fc82d409022e793446c1c5d7d6d8b0d7579f83.tar.xz | |
Generalize ExtendUsesToFormExtLoad to be usable for ANY_EXTEND,
in addition to ZERO_EXTEND and SIGN_EXTEND. Fix a bug in the
way it checked for live-out values, and simplify the way it
find users by using SDNode::use_iterator's (relatively) new
features. Also, make it slightly more permissive on targets
with free truncates.
In SelectionDAGBuild, avoid creating ANY_EXTEND nodes that are
larger than necessary. If the target's SwitchAmountTy has
enough bits, use it. This exposes the truncate to optimization
early, enabling more optimizations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68670 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/switch-zextload.ll')
| -rw-r--r-- | test/CodeGen/X86/switch-zextload.ll | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/test/CodeGen/X86/switch-zextload.ll b/test/CodeGen/X86/switch-zextload.ll new file mode 100644 index 0000000000..f3c701ff5f --- /dev/null +++ b/test/CodeGen/X86/switch-zextload.ll @@ -0,0 +1,34 @@ +; RUN: llvm-as < %s | llc -march=x86 | grep mov | count 1 + +; Do zextload, instead of a load and a separate zext. + +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 = "i386-apple-darwin9.6" + %struct.move_s = type { i32, i32, i32, i32, i32, i32 } + %struct.node_t = type { i8, i8, i8, i8, i32, i32, %struct.node_t**, %struct.node_t*, %struct.move_s } + +define fastcc void @set_proof_and_disproof_numbers(%struct.node_t* nocapture %node) nounwind { +entry: + %0 = load i8* null, align 1 ; <i8> [#uses=1] + switch i8 %0, label %return [ + i8 2, label %bb31 + i8 0, label %bb80 + i8 1, label %bb82 + i8 3, label %bb84 + ] + +bb31: ; preds = %entry + unreachable + +bb80: ; preds = %entry + ret void + +bb82: ; preds = %entry + ret void + +bb84: ; preds = %entry + ret void + +return: ; preds = %entry + ret void +} |