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https://github.com/c64scene-ar/llvm-6502.git
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2211d38267
Allow optimizations based on FP comparison values in the same way as integers. This resolves PR17713: http://llvm.org/bugs/show_bug.cgi?id=17713 Differential Revision: http://reviews.llvm.org/D6911 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225660 91177308-0d34-0410-b5e6-96231b3b80d8
96 lines
1.8 KiB
LLVM
96 lines
1.8 KiB
LLVM
; RUN: opt -gvn -S < %s | FileCheck %s
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define i32 @f1(i32 %x) {
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; CHECK-LABEL: define i32 @f1(
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bb0:
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%cmp = icmp eq i32 %x, 0
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br i1 %cmp, label %bb2, label %bb1
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bb1:
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br label %bb2
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bb2:
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%cond = phi i32 [ %x, %bb0 ], [ 0, %bb1 ]
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%foo = add i32 %cond, %x
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ret i32 %foo
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; CHECK: bb2:
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; CHECK: ret i32 %x
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}
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define i32 @f2(i32 %x) {
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; CHECK-LABEL: define i32 @f2(
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bb0:
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%cmp = icmp ne i32 %x, 0
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br i1 %cmp, label %bb1, label %bb2
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bb1:
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br label %bb2
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bb2:
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%cond = phi i32 [ %x, %bb0 ], [ 0, %bb1 ]
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%foo = add i32 %cond, %x
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ret i32 %foo
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; CHECK: bb2:
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; CHECK: ret i32 %x
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}
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define i32 @f3(i32 %x) {
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; CHECK-LABEL: define i32 @f3(
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bb0:
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switch i32 %x, label %bb1 [ i32 0, label %bb2]
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bb1:
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br label %bb2
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bb2:
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%cond = phi i32 [ %x, %bb0 ], [ 0, %bb1 ]
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%foo = add i32 %cond, %x
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ret i32 %foo
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; CHECK: bb2:
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; CHECK: ret i32 %x
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}
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declare void @g(i1)
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define void @f4(i8 * %x) {
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; CHECK-LABEL: define void @f4(
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bb0:
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%y = icmp eq i8* null, %x
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br i1 %y, label %bb2, label %bb1
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bb1:
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br label %bb2
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bb2:
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%zed = icmp eq i8* null, %x
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call void @g(i1 %zed)
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; CHECK: call void @g(i1 %y)
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ret void
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}
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define double @fcmp_oeq(double %x, double %y) {
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entry:
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%cmp = fcmp oeq double %y, 2.0
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br i1 %cmp, label %if, label %return
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if:
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%div = fdiv double %x, %y
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br label %return
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return:
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%retval.0 = phi double [ %div, %if ], [ %x, %entry ]
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ret double %retval.0
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; CHECK-LABEL: define double @fcmp_oeq(
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; CHECK: %div = fdiv double %x, 2.000000e+00
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}
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define double @fcmp_une(double %x, double %y) {
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entry:
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%cmp = fcmp une double %y, 2.0
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br i1 %cmp, label %return, label %else
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else:
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%div = fdiv double %x, %y
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br label %return
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return:
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%retval.0 = phi double [ %div, %else ], [ %x, %entry ]
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ret double %retval.0
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; CHECK-LABEL: define double @fcmp_une(
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; CHECK: %div = fdiv double %x, 2.000000e+00
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}
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