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https://github.com/c64scene-ar/llvm-6502.git
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25e6d48220
The normal tBX instruction is predicable, so there's no reason the pseudos for using it as a return shouldn't be. Gives us some nice code-gen improvements as can be seen by the test changes. In particular, several tests now have to disable if-conversion because it works too well and defeats the test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134746 91177308-0d34-0410-b5e6-96231b3b80d8
64 lines
1.5 KiB
LLVM
64 lines
1.5 KiB
LLVM
; RUN: llc < %s -ifcvt-limit=0 -mtriple=thumbv7-apple-darwin -mattr=+thumb2 | FileCheck %s
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; If-conversion defeats the purpose of this test, which is to check conditional
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; branch generation, so turn it off.
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define i32 @f1(i32 %a, i32 %b, i32* %v) {
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entry:
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; CHECK: f1:
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; CHECK: bne LBB
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%tmp = icmp eq i32 %a, %b ; <i1> [#uses=1]
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br i1 %tmp, label %cond_true, label %return
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cond_true: ; preds = %entry
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store i32 0, i32* %v
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ret i32 0
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return: ; preds = %entry
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ret i32 1
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}
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define i32 @f2(i32 %a, i32 %b, i32* %v) {
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entry:
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; CHECK: f2:
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; CHECK: bge LBB
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%tmp = icmp slt i32 %a, %b ; <i1> [#uses=1]
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br i1 %tmp, label %cond_true, label %return
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cond_true: ; preds = %entry
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store i32 0, i32* %v
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ret i32 0
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return: ; preds = %entry
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ret i32 1
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}
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define i32 @f3(i32 %a, i32 %b, i32* %v) {
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entry:
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; CHECK: f3:
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; CHECK: bhs LBB
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%tmp = icmp ult i32 %a, %b ; <i1> [#uses=1]
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br i1 %tmp, label %cond_true, label %return
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cond_true: ; preds = %entry
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store i32 0, i32* %v
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ret i32 0
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return: ; preds = %entry
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ret i32 1
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}
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define i32 @f4(i32 %a, i32 %b, i32* %v) {
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entry:
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; CHECK: f4:
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; CHECK: blo LBB
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%tmp = icmp ult i32 %a, %b ; <i1> [#uses=1]
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br i1 %tmp, label %return, label %cond_true
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cond_true: ; preds = %entry
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store i32 0, i32* %v
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ret i32 0
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return: ; preds = %entry
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ret i32 1
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}
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