Variable
int optimize_size
+; 0 means straightforward implementation of complex divide acceptable.
+; 1 means wide ranges of inputs must work for complex divide.
+; 2 means C99-like requirements for complex multiply and divide.
+Variable
+int flag_complex_method = 1
+
+; Nonzero if subexpressions must be evaluated from left-to-right.
+Variable
+int flag_evaluation_order = 0
+
+; Set the default region and algorithm for the integrated register
+; allocator.
+
+Variable
+enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB
+
+Variable
+enum ira_region flag_ira_region = IRA_REGION_MIXED
+
+; Language specific warning pass for unused results.
+Variable
+bool flag_warn_unused_result = false
+
+Variable
+int *param_values
+
+; Floating-point contraction mode, fast by default.
+Variable
+enum fp_contract_mode flag_fp_contract_mode = FP_CONTRACT_FAST
+
###
Driver
Common Optimization
Optimize for speed disregarding exact standards compliance
+R
+Driver Joined Separate
+
S
Driver
+T
+Driver Joined Separate
+
+Tbss
+Driver Separate
+
+Tdata
+Driver Separate
+
+Ttext
+Driver Separate
+
W
Common RejectNegative Warning Alias(Wextra)
This switch is deprecated; use -Wextra instead
Common RejectNegative Joined UInteger
falign-loops
-Common Report Var(align_loops) Optimization UInteger
+Common Report Var(align_loops,0) Optimization UInteger
Align the start of loops
falign-loops=
Common Report Var(flag_check_data_deps)
Compare the results of several data dependence analyzers.
+fcombine-stack-adjustments
+Common Report Var(flag_combine_stack_adjustments) Optimization
+Looks for opportunities to reduce stack adjustments and stack references.
+
fcommon
Common Report Var(flag_no_common,0) Optimization
Do not put uninitialized globals in the common section
Common Report Var(flag_forward_propagate) Optimization
Perform a forward propagation pass on RTL
+ffp-contract=
+Common Joined RejectNegative
+-ffp-contract=[off|on|fast] Perform floating-point expression contraction.
+
; Nonzero means don't put addresses of constant functions in registers.
; Used for compiling the Unix kernel, where strange substitutions are
; done on the assembly output.
Common Joined RejectNegative
-fira-region=[one|all|mixed] Set regions for IRA
-fira-coalesce
-Common Report Var(flag_ira_coalesce) Init(0)
-Do optimistic coalescing.
-
fira-loop-pressure
Common Report Var(flag_ira_loop_pressure)
Use IRA based register pressure calculation
Common Var(flag_lto)
Enable link-time optimization.
+flto-partition=1to1
+Common Var(flag_lto_partition_1to1)
+Partition functions and vars at linktime based on object files they originate from
+
+flto-partition=balanced
+Common Var(flag_lto_partition_balanced)
+Partition functions and vars at linktime into approximately same sized buckets
+
; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h.
flto-compression-level=
Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1)
Reorder functions to improve code placement
frerun-cse-after-loop
-Common Report Var(flag_rerun_cse_after_loop) Init(2) Optimization
+Common Report Var(flag_rerun_cse_after_loop) Optimization
Add a common subexpression elimination pass after loop optimizations
frerun-loop-opt
Perform scalar replacement of aggregates
ftree-ter
-Common Report Var(flag_tree_ter) Init(1) Optimization
+Common Report Var(flag_tree_ter) Optimization
Replace temporary expressions in the SSA->normal pass
ftree-lrs
Common JoinedOrMissing Negative(gcoff)
Generate debug information in extended XCOFF format
+h
+Driver Joined Separate
+
iplugindir=
Common Joined Var(plugindir_string) Init(0)
-iplugindir=<dir> Set <dir> to be the default plugin directory
Common RejectNegative Negative(shared)
Create a position independent executable
+z
+Driver Joined Separate
+
; This comment is to ensure we retain the blank line above.
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