summaryrefslogtreecommitdiffstats
path: root/llvm/test
diff options
context:
space:
mode:
Diffstat (limited to 'llvm/test')
-rw-r--r--llvm/test/Transforms/CodeGenPrepare/X86/select.ll127
1 files changed, 74 insertions, 53 deletions
diff --git a/llvm/test/Transforms/CodeGenPrepare/X86/select.ll b/llvm/test/Transforms/CodeGenPrepare/X86/select.ll
index 79b195d21ca..58d81b55be1 100644
--- a/llvm/test/Transforms/CodeGenPrepare/X86/select.ll
+++ b/llvm/test/Transforms/CodeGenPrepare/X86/select.ll
@@ -1,3 +1,4 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -codegenprepare -S < %s | FileCheck %s
target triple = "x86_64-unknown-unknown"
@@ -5,78 +6,82 @@ target triple = "x86_64-unknown-unknown"
; Nothing to sink and convert here.
define i32 @no_sink(double %a, double* %b, i32 %x, i32 %y) {
+; CHECK-LABEL: @no_sink(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[LOAD:%.*]] = load double, double* [[B:%.*]], align 8
+; CHECK-NEXT: [[CMP:%.*]] = fcmp olt double [[LOAD]], [[A:%.*]]
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[X:%.*]], i32 [[Y:%.*]]
+; CHECK-NEXT: ret i32 [[SEL]]
+;
entry:
%load = load double, double* %b, align 8
%cmp = fcmp olt double %load, %a
%sel = select i1 %cmp, i32 %x, i32 %y
ret i32 %sel
-
-; CHECK-LABEL: @no_sink(
-; CHECK: %load = load double, double* %b, align 8
-; CHECK: %cmp = fcmp olt double %load, %a
-; CHECK: %sel = select i1 %cmp, i32 %x, i32 %y
-; CHECK: ret i32 %sel
}
; An 'fdiv' is expensive, so sink it rather than speculatively execute it.
define float @fdiv_true_sink(float %a, float %b) {
+; CHECK-LABEL: @fdiv_true_sink(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt float [[A:%.*]], 1.000000e+00
+; CHECK-NEXT: br i1 [[CMP]], label [[SELECT_TRUE_SINK:%.*]], label [[SELECT_END:%.*]]
+; CHECK: select.true.sink:
+; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[A]], [[B:%.*]]
+; CHECK-NEXT: br label [[SELECT_END]]
+; CHECK: select.end:
+; CHECK-NEXT: [[SEL:%.*]] = phi float [ [[DIV]], [[SELECT_TRUE_SINK]] ], [ 2.000000e+00, [[ENTRY:%.*]] ]
+; CHECK-NEXT: ret float [[SEL]]
+;
entry:
%div = fdiv float %a, %b
%cmp = fcmp ogt float %a, 1.0
%sel = select i1 %cmp, float %div, float 2.0
ret float %sel
-
-; CHECK-LABEL: @fdiv_true_sink(
-; CHECK: %cmp = fcmp ogt float %a, 1.0
-; CHECK: br i1 %cmp, label %select.true.sink, label %select.end
-; CHECK: select.true.sink:
-; CHECK: %div = fdiv float %a, %b
-; CHECK: br label %select.end
-; CHECK: select.end:
-; CHECK: %sel = phi float [ %div, %select.true.sink ], [ 2.000000e+00, %entry ]
-; CHECK: ret float %sel
}
define float @fdiv_false_sink(float %a, float %b) {
+; CHECK-LABEL: @fdiv_false_sink(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt float [[A:%.*]], 3.000000e+00
+; CHECK-NEXT: br i1 [[CMP]], label [[SELECT_END:%.*]], label [[SELECT_FALSE_SINK:%.*]]
+; CHECK: select.false.sink:
+; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[A]], [[B:%.*]]
+; CHECK-NEXT: br label [[SELECT_END]]
+; CHECK: select.end:
+; CHECK-NEXT: [[SEL:%.*]] = phi float [ 4.000000e+00, [[ENTRY:%.*]] ], [ [[DIV]], [[SELECT_FALSE_SINK]] ]
+; CHECK-NEXT: ret float [[SEL]]
+;
entry:
%div = fdiv float %a, %b
%cmp = fcmp ogt float %a, 3.0
%sel = select i1 %cmp, float 4.0, float %div
ret float %sel
-
-; CHECK-LABEL: @fdiv_false_sink(
-; CHECK: %cmp = fcmp ogt float %a, 3.0
-; CHECK: br i1 %cmp, label %select.end, label %select.false.sink
-; CHECK: select.false.sink:
-; CHECK: %div = fdiv float %a, %b
-; CHECK: br label %select.end
-; CHECK: select.end:
-; CHECK: %sel = phi float [ 4.000000e+00, %entry ], [ %div, %select.false.sink ]
-; CHECK: ret float %sel
}
define float @fdiv_both_sink(float %a, float %b) {
+; CHECK-LABEL: @fdiv_both_sink(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt float [[A:%.*]], 5.000000e+00
+; CHECK-NEXT: br i1 [[CMP]], label [[SELECT_TRUE_SINK:%.*]], label [[SELECT_FALSE_SINK:%.*]]
+; CHECK: select.true.sink:
+; CHECK-NEXT: [[DIV1:%.*]] = fdiv float [[A]], [[B:%.*]]
+; CHECK-NEXT: br label [[SELECT_END:%.*]]
+; CHECK: select.false.sink:
+; CHECK-NEXT: [[DIV2:%.*]] = fdiv float [[B]], [[A]]
+; CHECK-NEXT: br label [[SELECT_END]]
+; CHECK: select.end:
+; CHECK-NEXT: [[SEL:%.*]] = phi float [ [[DIV1]], [[SELECT_TRUE_SINK]] ], [ [[DIV2]], [[SELECT_FALSE_SINK]] ]
+; CHECK-NEXT: ret float [[SEL]]
+;
entry:
%div1 = fdiv float %a, %b
%div2 = fdiv float %b, %a
%cmp = fcmp ogt float %a, 5.0
%sel = select i1 %cmp, float %div1, float %div2
ret float %sel
-
-; CHECK-LABEL: @fdiv_both_sink(
-; CHECK: %cmp = fcmp ogt float %a, 5.0
-; CHECK: br i1 %cmp, label %select.true.sink, label %select.false.sink
-; CHECK: select.true.sink:
-; CHECK: %div1 = fdiv float %a, %b
-; CHECK: br label %select.end
-; CHECK: select.false.sink:
-; CHECK: %div2 = fdiv float %b, %a
-; CHECK: br label %select.end
-; CHECK: select.end:
-; CHECK: %sel = phi float [ %div1, %select.true.sink ], [ %div2, %select.false.sink ]
-; CHECK: ret float %sel
}
; But if the select is marked unpredictable, then don't turn it into a branch.
@@ -84,8 +89,8 @@ entry:
define float @unpredictable_select(float %a, float %b) {
; CHECK-LABEL: @unpredictable_select(
; CHECK-NEXT: entry:
-; CHECK-NEXT: [[DIV:%.*]] = fdiv float %a, %b
-; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt float %a, 1.000000e+00
+; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt float [[A]], 1.000000e+00
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], float [[DIV]], float 2.000000e+00, !unpredictable !0
; CHECK-NEXT: ret float [[SEL]]
;
@@ -101,13 +106,16 @@ entry:
; An 'fadd' is not too expensive, so it's ok to speculate.
define float @fadd_no_sink(float %a, float %b) {
+; CHECK-LABEL: @fadd_no_sink(
+; CHECK-NEXT: [[ADD:%.*]] = fadd float [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt float 6.000000e+00, [[A]]
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], float [[ADD]], float 7.000000e+00
+; CHECK-NEXT: ret float [[SEL]]
+;
%add = fadd float %a, %b
%cmp = fcmp ogt float 6.0, %a
%sel = select i1 %cmp, float %add, float 7.0
ret float %sel
-
-; CHECK-LABEL: @fadd_no_sink(
-; CHECK: %sel = select i1 %cmp, float %add, float 7.0
}
; Possible enhancement: sinkability is only calculated with the direct
@@ -115,15 +123,20 @@ define float @fadd_no_sink(float %a, float %b) {
; taken into account.
define float @fdiv_no_sink(float %a, float %b) {
+; CHECK-LABEL: @fdiv_no_sink(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[ADD:%.*]] = fadd float [[DIV]], [[B]]
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt float [[A]], 1.000000e+00
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], float [[ADD]], float 8.000000e+00
+; CHECK-NEXT: ret float [[SEL]]
+;
entry:
%div = fdiv float %a, %b
%add = fadd float %div, %b
%cmp = fcmp ogt float %a, 1.0
%sel = select i1 %cmp, float %add, float 8.0
ret float %sel
-
-; CHECK-LABEL: @fdiv_no_sink(
-; CHECK: %sel = select i1 %cmp, float %add, float 8.0
}
; Do not transform the CFG if the select operands may have side effects.
@@ -132,24 +145,32 @@ declare i64* @bar(i32, i32, i32)
declare i64* @baz(i32, i32, i32)
define i64* @calls_no_sink(i32 %in) {
+; CHECK-LABEL: @calls_no_sink(
+; CHECK-NEXT: [[CALL1:%.*]] = call i64* @bar(i32 1, i32 2, i32 3)
+; CHECK-NEXT: [[CALL2:%.*]] = call i64* @baz(i32 1, i32 2, i32 3)
+; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i32 [[IN:%.*]], 0
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TOBOOL]], i64* [[CALL1]], i64* [[CALL2]]
+; CHECK-NEXT: ret i64* [[SEL]]
+;
%call1 = call i64* @bar(i32 1, i32 2, i32 3)
%call2 = call i64* @baz(i32 1, i32 2, i32 3)
%tobool = icmp ne i32 %in, 0
%sel = select i1 %tobool, i64* %call1, i64* %call2
ret i64* %sel
-
-; CHECK-LABEL: @calls_no_sink(
-; CHECK: %sel = select i1 %tobool, i64* %call1, i64* %call2
}
define i32 @sdiv_no_sink(i32 %a, i32 %b) {
+; CHECK-LABEL: @sdiv_no_sink(
+; CHECK-NEXT: [[DIV1:%.*]] = sdiv i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[DIV2:%.*]] = sdiv i32 [[B]], [[A]]
+; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[A]], 5
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[DIV1]], i32 [[DIV2]]
+; CHECK-NEXT: ret i32 [[SEL]]
+;
%div1 = sdiv i32 %a, %b
%div2 = sdiv i32 %b, %a
%cmp = icmp sgt i32 %a, 5
%sel = select i1 %cmp, i32 %div1, i32 %div2
ret i32 %sel
-
-; CHECK-LABEL: @sdiv_no_sink(
-; CHECK: %sel = select i1 %cmp, i32 %div1, i32 %div2
}
OpenPOWER on IntegriCloud