forked from OSchip/llvm-project
85 lines
2.8 KiB
LLVM
85 lines
2.8 KiB
LLVM
; RUN: llc < %s -march=x86-64 -relocation-model=pic | FileCheck %s
|
|
; This test is to ensure the TwoAddrInstruction pass chooses the proper operands to
|
|
; merge and generates fewer mov insns.
|
|
|
|
@M = common global i32 0, align 4
|
|
@total = common global i32 0, align 4
|
|
@g = common global i32 0, align 4
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define void @foo() {
|
|
entry:
|
|
%0 = load i32, i32* @M, align 4
|
|
%cmp3 = icmp sgt i32 %0, 0
|
|
br i1 %cmp3, label %for.body.lr.ph, label %for.end
|
|
|
|
for.body.lr.ph: ; preds = %entry
|
|
%total.promoted = load i32, i32* @total, align 4
|
|
br label %for.body
|
|
|
|
; Check that only one mov will be generated in the kernel loop.
|
|
; CHECK-LABEL: foo:
|
|
; CHECK: [[LOOP1:^[a-zA-Z0-9_.]+]]: {{#.*}} %for.body
|
|
; CHECK-NOT: mov
|
|
; CHECK: movl {{.*}}, [[REG1:%[a-z0-9]+]]
|
|
; CHECK-NOT: mov
|
|
; CHECK: shrl $31, [[REG1]]
|
|
; CHECK-NOT: mov
|
|
; CHECK: jl [[LOOP1]]
|
|
for.body: ; preds = %for.body.lr.ph, %for.body
|
|
%add5 = phi i32 [ %total.promoted, %for.body.lr.ph ], [ %add, %for.body ]
|
|
%i.04 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
|
|
%div = sdiv i32 %i.04, 2
|
|
%add = add nsw i32 %div, %add5
|
|
%inc = add nuw nsw i32 %i.04, 1
|
|
%cmp = icmp slt i32 %inc, %0
|
|
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
|
|
|
|
for.cond.for.end_crit_edge: ; preds = %for.body
|
|
store i32 %add, i32* @total, align 4
|
|
br label %for.end
|
|
|
|
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define void @goo() {
|
|
entry:
|
|
%0 = load i32, i32* @M, align 4
|
|
%cmp3 = icmp sgt i32 %0, 0
|
|
br i1 %cmp3, label %for.body.lr.ph, label %for.end
|
|
|
|
for.body.lr.ph: ; preds = %entry
|
|
%total.promoted = load i32, i32* @total, align 4
|
|
br label %for.body
|
|
|
|
; Check that only two mov will be generated in the kernel loop.
|
|
; CHECK-LABEL: goo:
|
|
; CHECK: [[LOOP2:^[a-zA-Z0-9_.]+]]: {{#.*}} %for.body
|
|
; CHECK-NOT: mov
|
|
; CHECK: movl {{.*}}, [[REG2:%[a-z0-9]+]]
|
|
; CHECK-NOT: mov
|
|
; CHECK: shrl $31, [[REG2]]
|
|
; CHECK-NOT: mov
|
|
; CHECK: movl {{.*}}
|
|
; CHECK: jl [[LOOP2]]
|
|
for.body: ; preds = %for.body.lr.ph, %for.body
|
|
%add5 = phi i32 [ %total.promoted, %for.body.lr.ph ], [ %add, %for.body ]
|
|
%i.04 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
|
|
%div = sdiv i32 %i.04, 2
|
|
%add = add nsw i32 %div, %add5
|
|
store volatile i32 %add, i32* @g, align 4
|
|
%inc = add nuw nsw i32 %i.04, 1
|
|
%cmp = icmp slt i32 %inc, %0
|
|
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
|
|
|
|
for.cond.for.end_crit_edge: ; preds = %for.body
|
|
store i32 %add, i32* @total, align 4
|
|
br label %for.end
|
|
|
|
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
|
|
ret void
|
|
}
|
|
|