0676acb6fd
Should cover most of the tests for GVN, GVNHoist, GVNSink, GlobalOpt, GlobalSplit, InstCombine, Reassociate, SROA and TailCallElim that had not been updated earlier.
240 lines
5.1 KiB
LLVM
240 lines
5.1 KiB
LLVM
; RUN: opt -passes=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_not_zero(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 = phi double [ %div, %if ], [ %x, %entry ]
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ret double %retval
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; CHECK-LABEL: define double @fcmp_oeq_not_zero(
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; CHECK: %div = fdiv double %x, 2.0
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}
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define double @fcmp_une_not_zero(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 = phi double [ %div, %else ], [ %x, %entry ]
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ret double %retval
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; CHECK-LABEL: define double @fcmp_une_not_zero(
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; CHECK: %div = fdiv double %x, 2.0
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}
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define double @fcmp_one_possibly_nan(double %x, double %y) {
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entry:
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%cmp = fcmp one 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 = phi double [ %div, %else ], [ %x, %entry ]
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ret double %retval
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; CHECK-LABEL: define double @fcmp_one_possibly_nan(
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; CHECK: %div = fdiv double %x, %y
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}
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define double @fcmp_one_not_zero_or_nan(double %x, double %y) {
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entry:
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%cmp = fcmp nnan one 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 = phi double [ %div, %else ], [ %x, %entry ]
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ret double %retval
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; CHECK-LABEL: define double @fcmp_one_not_zero_or_nan(
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; CHECK: %div = fdiv double %x, 2.0
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}
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; PR22376 - We can't propagate zero constants because -0.0
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; compares equal to 0.0. If %y is -0.0 in this test case,
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; we would produce the wrong sign on the infinity return value.
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define double @fcmp_oeq_zero(double %x, double %y) {
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entry:
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%cmp = fcmp oeq double %y, 0.0
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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 = phi double [ %div, %if ], [ %x, %entry ]
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ret double %retval
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; CHECK-LABEL: define double @fcmp_oeq_zero(
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; CHECK: %div = fdiv double %x, %y
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}
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define double @fcmp_une_zero(double %x, double %y) {
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entry:
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%cmp = fcmp une double %y, -0.0
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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 = phi double [ %div, %else ], [ %x, %entry ]
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ret double %retval
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; CHECK-LABEL: define double @fcmp_une_zero(
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; CHECK: %div = fdiv double %x, %y
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}
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; We also cannot propagate a value if it's not a constant.
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; This is because the value could be 0.0 or -0.0.
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define double @fcmp_oeq_maybe_zero(double %x, double %y, double %z1, double %z2) {
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entry:
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%z = fadd double %z1, %z2
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%cmp = fcmp oeq double %y, %z
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br i1 %cmp, label %if, label %return
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if:
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%div = fdiv double %x, %z
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br label %return
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return:
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%retval = phi double [ %div, %if ], [ %x, %entry ]
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ret double %retval
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; CHECK-LABEL: define double @fcmp_oeq_maybe_zero(
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; CHECK: %div = fdiv double %x, %z
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}
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define double @fcmp_une_maybe_zero(double %x, double %y, double %z1, double %z2) {
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entry:
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%z = fadd double %z1, %z2
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%cmp = fcmp une double %y, %z
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br i1 %cmp, label %return, label %else
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else:
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%div = fdiv double %x, %z
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br label %return
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return:
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%retval = phi double [ %div, %else ], [ %x, %entry ]
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ret double %retval
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; CHECK-LABEL: define double @fcmp_une_maybe_zero(
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; CHECK: %div = fdiv double %x, %z
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}
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define double @fcmp_ueq_possibly_nan(double %x, double %y) {
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entry:
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%cmp = fcmp ueq double %y, 2.0
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br i1 %cmp, label %do_div, label %return
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do_div:
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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 = phi double [ %div, %do_div ], [ %x, %entry ]
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ret double %retval
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; CHECK-LABEL: define double @fcmp_ueq_possibly_nan(
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; CHECK: %div = fdiv double %x, %y
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}
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define double @fcmp_ueq_not_zero_or_nan(double %x, double %y) {
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entry:
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%cmp = fcmp nnan ueq double %y, 2.0
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br i1 %cmp, label %do_div, label %return
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do_div:
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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 = phi double [ %div, %do_div ], [ %x, %entry ]
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ret double %retval
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; CHECK-LABEL: define double @fcmp_ueq_not_zero_or_nan(
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; CHECK: %div = fdiv double %x, 2.0
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}
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